LR CC Classic crashes right after startup

Hey there,

my LR CC CLassic (V 7.5 and all other versions later 7.2) began to crash right after startup today - I didn't change anything in my system, no new drivers, no new software, no change in preferences. It's just horrible, can't work with that - I even can't open any menus in LR, it crashes too quick after start.

Things I tried:
- installed all the latest drivers

- calibrated the monitor

- rebooted the system (was the first I tried)
- disabled gpu support in lr manually

- disconnected all network drives

- tried a new cataloge

- tried different cataloges

now I downgraded LR to 7.2 and this one works... But that's not the solution I need.

Any1 expecting same errors ?