Since I've updated to 2019, Most of dwg file on which I've worked with 2018 or former version can't be open.
Actually, almost every time I try open a dwg file, it crashes.

Strangely, some (very few though) files can be open.

This means not only I can't work, but also I'm loosing my previous works...

Really SERIOUS PROBLEM.
Hopefully someone has a solution for me...