! Your saves for sure will be corrupted after update.
[edited] So I publish old versions of the game.
You can find them in Beta-versions section in game's preferences on Steam.

There is no other way for it because of GZDoom's specifics.
Frequent patches are needed now. I plan to release first day fixes until the end of this weekend.
After that, I will do content updates. They will be large and rare.