Return to an already open app when a user tries to open a new instance if same version?
106361
How to Return to an already open application when a user tries to open a new instance if same version?
138642
Should the "closed as duplicate" message be altered?
108389
Why does my Mac's list of "Open with" applications start listing the apps twice and sometimes three times?
113945
Qt: Best practice for a single instance app protection
75493
How can I launch back the app that opened my custom URL scheme?
63430
attempt to re-open an already-closed object: SQLiteDatabase
53802
How do I remove duplicate "Open With" context menu items in Finder.app?
96480
How can I add a new application to the Open With menu?
148899
Is there an option to create and Opt-in a user in the same API call?
54408
Vote to reopen questions in the iOS app
10275
Always open new window from start screen
34371
Can I force an iPhone user to upgrade an application?
143305
how to avoid the "downloaded application" warning for a Standard User
18936
Possible to create new Application Handler?
57454
Launch an app from within another (iPhone)
1899
How can I modify the list of Applications under 'Open With...'?
65848
Dealing with SavedInstances, and restoration of activity