We have installed LB on a lot of different windows 10 computers at the school.
If a communication error to the Ruida controller happens then almost always the program will not allow you to save your work. Only work-a-round is to start another instance and copy the graphics over to save it from the new instance.
Save or save as does not work. No file menu shows up. I can export as an svg though.
Seen this problem in versions from 0.9 all the way to the latest 1.1.03