Hey, I'm sorry you're having issues. It looks like there's a bug in save conversion from versions older than <3.2.
I'll fix this issue in the next release, but until then you have 2 options:
- If you've kept a backup of your save before converting to v3.4, first open it using v3.3 (found here) and the bug should no longer happen
- Start a new save for v3.4
Thanks for reporting this to me.