Save corruption after building a keep

[Kerek]

I had several freezes when placing monument buildings (tax collectors, treasury, etc.).
I have tried to build a keep, and after the builders started building the keep, the game once again freezes (need to exit using the task-manager), and since *all* the saves in this village are no longer loading (crashing to desktop on at least the last 5-6 saves, even if the it is before placing the keep).

Restarted my PC and reinstalled the game, still none of them work.

I have sent several crash reports, but it seems to be wider than just one save file...