Snapmaker Luban shows a blank screen

Snapmaker Luban got updated. Now it shows an empty window: What to do now???
snapmaker Luban empty window
My previous version 3.10 never showed this problem.
I started a discussion at facebook without a solution yet.
Uninstalling and reinstalling old version doesn’t work either any more! CCleaner registry and updating nvidia driver didn’t help. “View in browser” (in Firefox) never worked. Cura, SnapmakerJS and my other CAD and 3D software do work, but Luban does not. Please help!