Stack Overflow Error

Anyone run into this? On one of my parks, I tried to open it, and the game crash giving this error. So, I opened another park, works fine. Make a new coaster, go to freeze it, get the same error, game crashes. On several of my used-to-work-just-fine coasters, if they are frozen, the game won't load. This problem seems to have started overnight. Anyone run into this and have the fix? I have long forgotten my registration details, so I'd prefer to avoid uninstalling if this is a known issue.

That happens whenever I try to load this into NL2.