I have been playing KSP for a while on this computer, I recently updated to 1.12 and for a week or so I was playing without trouble, but since a few days ago, the graphics are totally broken, showing this weird lines and shapes all the time, in all of the game screens, Star Menu, KSC, Map, Fly mode, everywhere.
I have fully updated graphics drivers, uninstalled KSP from Steam and reinstalled, played around with settings but nothing seems to work.
My computer is a DELL laptop Inspiron 5547, with 8GB of RAM, Windows 10 Home 64-bit and its GPU is AMD Radeon R7 M260. I made no hardware or software changes recently.
Following are two sample screenshots showing the problem: