That actually fixed it for me. Thanks for the quick support.
Love the software since many many years now.Thank you very much. I hope you still enjoy this project
Hi @Andreas_Hegenberg ,
I'm still experiencing the 'stuck in right-click mode' issue 
Also I noticed that the issue consistently occurs (not every time, but saw it twice in a short period of time) after I cleaned my keyboard using your KeyboardCleanTool app, which I use constantly