In my experience, usually freaky graphics things are related to graphic DPI or compatibility setting. Right click on the BIAB shortcut and try to change DPI settings on the bottom of the list to something else, just for testing purposes. Seems like it is a monitor/video card related.

Another thing to try, is just re-install latest BIAB patch from here:
https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=600680#Post600680

It should overwrite the whole program, but not the content. That might help.
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And something else.. Windows pushed update within last couple of days, and I know it messed up some drivers for people. In my case, it was audio interface driver. Just stopped working... Had to re-install to make it work again.

Good luck.