Hey everyone, i've just released hotfix 0.52f, however - due to change in plant caching, old saves (and options) have been wiped. Sorry for the inconvenience, but because of current bug-tracking process the wipes might happen from time to time.
In future version i'll implement an option to try and convert old save to current version, but since the last release was still pretty unstable, i've preferred to just quickly release the fixes. Hope they'll work, sorry again!