Ligthroom Classic: Crop tool (image preview corruption)

Looks like either a graphics driver issue (try disabling Use Graphics Processor) or the files themselves might have problem. Does this happen with every file? Does it happen moving sliders in the Develop module.

Turned the graphics driver off and it went away. Turned it back on and everything seems fine now.

Does this mean my graphics card is going bad?

Now, the graphics card stuff is ok, I can't right click and get the 'edit in' tab! All the selections are grayed out!

You HAVE rebooted, right?

Well, I don't think so, so when I get in this morning, I will! 

Rebooted and right clicking still produces a greyed out 'edit in Photoshop' button. Now I can't save my PS work automatically back into LR.