In ArcMap when I set the Python script editor to Notepad++ (C:\Program Files (x86)\Notepad++\notepad++.exe) and open a script tool from a toolbox in Catalog with right click > edit, the currently open notepad++ opens a new tab in the existing notepad++ instance.
HOWEVER, in Pro 2.5, Pro opens a new instance instead of using the existing one.
Note the two instances of Notepad++ below (two windows):
Not such a big deal for notepad++ because it launches so fast, but I really like Wing and it's really slow if I have to launch it each time I edit.
Is this because my Notepad++ is 32 bit? Or is this symptom of the multi threaded nature of Pro?
Update Submitted to support Esri Case #02595592 - ArcGIS Pro editor opens in new instance