I just installed PL on my Windows 10 Pro system (note: I have 2 monitors with DisplayFusion running). When I attempt to enter anything or click an option, I get multiple copies of the PL window inside or alongside each other. I have closed the program and re-opened it and get the same result. If I move my mouse inside the window, all the sub-windows come with it and even more may appear AND DISAPPEAR.
This makes the interface totally unusable, as the element overlapping hides the data entry fields.
Diff:
Another program I have that is based on Java had the same problem. When I updated that program to work with Java 8.131, the problem went away. BUt i do not see any updates for ProjectLibre.
Seeing this issue in 2021 on Windows 10 and agree that it makes the program largely unusable.