Submenues cannot be clicked on

[dl1daw]

I operate SWL version 5.115 and Windows 11 operating system. For a while in a creeping process I cannot open the submenues. For example I can open the menue "Options" by mouse click and the submenues become visible. However I cannot open any submenue like (Options for the active window) by mouse click although the submenue is highlighted.
This error happens only in SWL not in other installed programmes/apps.
What is the reason for this error and how to correct it?
Shall I rollback to SWL version 5.114 or lower? How to rollback? What is the rollbackprocess?
I highly appreciate any support and assistance to eliminate this error.
Kind regards
Achim, DL1DAW