SourceTree v3.3.9 - Minimize and maximize problem after changing monitor environment

[Stefan Leitner]

I'm using Win10 and when I minimize SourceTree v3.3.9 I can't maximize it again with just clicking on the Taskbar item.
Workaround: Click on "SourceTree Taskbar item", Alt+Space and then click on "Maximize"

I changed my monitor environment and the new monitor is now on the left side, instead on the right side. It looks like Sourcetree opens on the "wrong" not connected monitor. Pressing Windows+Arrow Key do not help.

Any hints how I can solve this? (without the workaround)

Thx