MEnus not working

I have a weird issue: I cannot use the menus anymore since updating to v5.2 They open if I click (permanently) on them but if I release the mouse they are closed. So I cannot activate any menu item.

What am I doing wrong?


it would be helpful if you could provide some more details about your operating system/desktop environment

You are completely right, sorry for not having provided this in the first place.

Jabref: Version 5.2 (portable)
Java: Version 1.8.0_281
OS: Windows 20 (64 bit), Version 10.0.19042.804