For the record, I have the same problem. I just installed DaVinci Lite 11.3.1 and whenevery thumbnail images start to appear in the library, it crashes. I switched the library to detail view and was able to get a step further, but when I load my DCI 4K footage from my PXW-FS7 (XAVC), and make a timeline from footage, DaVinci crashes. It crashed 30 or 40 times in the 45 minutes that I spent with it.
I'm running a GTX680 GPU with 4GB VRAM
Main system has the minimum 8GB RAM and quad core Xtreme CPU running at 4.1 GHz. All media and app drives are SSDs.
I'm a veteran user of Premier Pro, presently at CS6, but the XAVC format is incompatible with Premiere, so I'm looking for an alternative NLE so that I can actually edit the footage I shoot. Resolve Lite looked like it would be a savior, but it's too unstable to be of use.