I have just installed version 12.1 and a new default setting is bothering me. Previously when I used to open a notebook file and following that open another one, it used to open in the same instance of Wolfram Desktop rather than creating a new one every time. Is there an option to change it back to this behaviour?

  • $\begingroup$ At a minimum, I would suggest you tell us your OS, and also how do you open your notebooks. (I suspect it's Windows and double-clicking on the file in explorer, respectively, but we don't have to guess). $\endgroup$
    – Victor K.
    Mar 30 '20 at 19:47
  • $\begingroup$ @VictorK. yes, it is windows and I open files by double-clicking in the file explorer. Prior to version 12.1, it used to open in the same instance but now every time I click a file it starts another instance to open it in it. $\endgroup$
    – user13892
    Mar 30 '20 at 19:51
  • $\begingroup$ @user13892, I cannot reproduce that behavior. Windows 7 or Windows 8/8.1/10? $\endgroup$
    – ihojnicki
    Mar 30 '20 at 21:15
  • $\begingroup$ @ihojnicki Window 10 1903 $\endgroup$
    – user13892
    Mar 30 '20 at 21:20
  • $\begingroup$ @user13892, the only times I've heard of that happening is when either the FrontEnd was too busy to handle the event, an anti-virus app was getting in the way, or it was being run at a different elevation level. i.e. as Administrator, Protected Mode/Low, etc... $\endgroup$
    – ihojnicki
    Mar 30 '20 at 21:46

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