<p>ファイル名の後ろについている拡張子により起動するアプリを変更するにはどうすればよいか？<&sol;p>&NewLine;<p>例えば拡張子がjpegのとき起動するアプリがAdobe Readerになっていて、それをAdobe Acrobatに変更したいとします。jpegファイルをダブルクリックしたらAcrobatで起動してくれれば楽になります。<&sol;p>&NewLine;<p>今回はpngファイルをダブルクリックしたときに起動するアプリを変更してみましょう。iPhoneでスクリーンショットを撮ったとき、<span style&equals;"color&colon; &num;ff0000&semi;">pngファイル<&sol;span>で保存されます。このpngファイルをダブルクリックすると自分の環境ではAdobeのFireworksが起動するのですが、Adobe系のアプリは起動するのに時間がかかりすぎてイライラします。そこで使い勝手のいいSkitchに変更してみました。<&sol;p>&NewLine;<h3>拡張子により起動するアプリを変更する方法<&sol;h3>&NewLine;<p>左下のWindowsボタンをクリック<&sol;p>&NewLine;<p>＞「既定のプログラム」をクリック<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;8a8cb23ebbc07578a5fac3d433faeb75&period;jpg"><img data-attachment-id&equals;"2583" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;8a8cb23ebbc07578a5fac3d433faeb75&period;jpg&quest;fit&equals;509&percnt;2C736&amp&semi;ssl&equals;1" data-orig-size&equals;"509&comma;736" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133359&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;8a8cb23ebbc07578a5fac3d433faeb75&period;jpg&quest;fit&equals;276&percnt;2C400&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;8a8cb23ebbc07578a5fac3d433faeb75&period;jpg&quest;fit&equals;509&percnt;2C736&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2583" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;8a8cb23ebbc07578a5fac3d433faeb75-276x400&period;jpg" alt&equals;"20140925&lowbar;133359&lowbar;拡張子により起動するアプリを変更" width&equals;"276" height&equals;"400" &sol;><&sol;a><&sol;p>&NewLine;<p>上から2番目の［ファイルの種類またはプロトコールのプログラムへの関連付け］をクリック<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;bbc52c2f26d8e8d2da25552350f3d4b1&period;jpg"><img data-attachment-id&equals;"2584" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;bbc52c2f26d8e8d2da25552350f3d4b1&period;jpg&quest;fit&equals;644&percnt;2C303&amp&semi;ssl&equals;1" data-orig-size&equals;"644&comma;303" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133419&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;bbc52c2f26d8e8d2da25552350f3d4b1&period;jpg&quest;fit&equals;400&percnt;2C188&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;bbc52c2f26d8e8d2da25552350f3d4b1&period;jpg&quest;fit&equals;644&percnt;2C303&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2584" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;bbc52c2f26d8e8d2da25552350f3d4b1-400x188&period;jpg" alt&equals;"20140925&lowbar;133419&lowbar;拡張子により起動するアプリを変更" width&equals;"400" height&equals;"188" &sol;><&sol;a><&sol;p>&NewLine;<p>pngファイルを起動するときに関連付けられているところをクリック<&sol;p>&NewLine;<p>＞右上のプログラム変更ボタンをクリック<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;12719275601f1f398552359d468397a8&period;jpg"><img data-attachment-id&equals;"2585" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;12719275601f1f398552359d468397a8&period;jpg&quest;fit&equals;1024&percnt;2C703&amp&semi;ssl&equals;1" data-orig-size&equals;"1024&comma;703" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133513&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;12719275601f1f398552359d468397a8&period;jpg&quest;fit&equals;400&percnt;2C274&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;12719275601f1f398552359d468397a8&period;jpg&quest;fit&equals;660&percnt;2C453&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2585" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;12719275601f1f398552359d468397a8-400x274&period;jpg" alt&equals;"20140925&lowbar;133513&lowbar;拡張子により起動するアプリを変更" width&equals;"400" height&equals;"274" &sol;><&sol;a><&sol;p>&NewLine;<p>推奨されたプログラムの中に変更したいアプリがない場合は右下の［参照］をクリックして、アプリを探します。<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;07b37228c48018e759d61aed5bffe28f&period;jpg"><img data-attachment-id&equals;"2586" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;07b37228c48018e759d61aed5bffe28f&period;jpg&quest;fit&equals;672&percnt;2C445&amp&semi;ssl&equals;1" data-orig-size&equals;"672&comma;445" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133813&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;07b37228c48018e759d61aed5bffe28f&period;jpg&quest;fit&equals;400&percnt;2C264&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;07b37228c48018e759d61aed5bffe28f&period;jpg&quest;fit&equals;660&percnt;2C437&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2586" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;07b37228c48018e759d61aed5bffe28f-400x264&period;jpg" alt&equals;"20140925&lowbar;133813&lowbar;拡張子により起動するアプリを変更" width&equals;"400" height&equals;"264" &sol;><&sol;a><&sol;p>&NewLine;<p>ショートカットでもいいのでSkitchを見つけたなら［開く］をクリック<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;ca37fd4a4dacb3a747d72a3d4cbae61e&period;jpg"><img data-attachment-id&equals;"2580" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;ca37fd4a4dacb3a747d72a3d4cbae61e&period;jpg&quest;fit&equals;625&percnt;2C900&amp&semi;ssl&equals;1" data-orig-size&equals;"625&comma;900" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133842&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;ca37fd4a4dacb3a747d72a3d4cbae61e&period;jpg&quest;fit&equals;277&percnt;2C400&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;ca37fd4a4dacb3a747d72a3d4cbae61e&period;jpg&quest;fit&equals;625&percnt;2C900&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2580" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;ca37fd4a4dacb3a747d72a3d4cbae61e-277x400&period;jpg" alt&equals;"20140925&lowbar;133842&lowbar;拡張子により起動するアプリを変更" width&equals;"277" height&equals;"400" &sol;><&sol;a><&sol;p>&NewLine;<p>プログラム本体を選択して［OK］ボタンをクリック<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;892a958b461ad07e5ee3acb44f62f108&period;jpg"><img data-attachment-id&equals;"2581" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;892a958b461ad07e5ee3acb44f62f108&period;jpg&quest;fit&equals;672&percnt;2C445&amp&semi;ssl&equals;1" data-orig-size&equals;"672&comma;445" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133856&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;892a958b461ad07e5ee3acb44f62f108&period;jpg&quest;fit&equals;400&percnt;2C264&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;892a958b461ad07e5ee3acb44f62f108&period;jpg&quest;fit&equals;660&percnt;2C437&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2581" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;892a958b461ad07e5ee3acb44f62f108-400x264&period;jpg" alt&equals;"20140925&lowbar;133856&lowbar;拡張子により起動するアプリを変更" width&equals;"400" height&equals;"264" &sol;><&sol;a><&sol;p>&NewLine;<p>そうすると下のようにpngファイルとSkitchが関連付けられます。<&sol;p>&NewLine;<p><a href&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;f838b6812a0c487a794758c293c23f8f&period;jpg"><img data-attachment-id&equals;"2582" data-permalink&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;archives&sol;2559&sol;attachment-0" data-orig-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;f838b6812a0c487a794758c293c23f8f&period;jpg&quest;fit&equals;1024&percnt;2C571&amp&semi;ssl&equals;1" data-orig-size&equals;"1024&comma;571" data-comments-opened&equals;"1" data-image-meta&equals;"&lbrace;&quot&semi;aperture&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;credit&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;camera&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;caption&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;created&lowbar;timestamp&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;copyright&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;focal&lowbar;length&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;iso&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;shutter&lowbar;speed&quot&semi;&colon;&quot&semi;0&quot&semi;&comma;&quot&semi;title&quot&semi;&colon;&quot&semi;&quot&semi;&comma;&quot&semi;orientation&quot&semi;&colon;&quot&semi;0&quot&semi;&rcub;" data-image-title&equals;"20140925&lowbar;133938&lowbar;拡張子により起動するアプリを変更" data-image-description&equals;"" data-image-caption&equals;"" data-medium-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;f838b6812a0c487a794758c293c23f8f&period;jpg&quest;fit&equals;400&percnt;2C223&amp&semi;ssl&equals;1" data-large-file&equals;"https&colon;&sol;&sol;i0&period;wp&period;com&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;f838b6812a0c487a794758c293c23f8f&period;jpg&quest;fit&equals;660&percnt;2C368&amp&semi;ssl&equals;1" class&equals;"alignnone size-medium wp-image-2582" src&equals;"https&colon;&sol;&sol;bacque&period;biz&sol;wp-content&sol;uploads&sol;2014&sol;09&sol;f838b6812a0c487a794758c293c23f8f-400x223&period;jpg" alt&equals;"20140925&lowbar;133938&lowbar;拡張子により起動するアプリを変更" width&equals;"400" height&equals;"223" &sol;><&sol;a><&sol;p>&NewLine;<p>以上でpngファイルをダブルクリックすると自動的にSkitchが起動するようになり、便利になりました。<&sol;p>&NewLine;