Neither of your suggestions worked, unfortunately. I got the cheat thing done and replaced the text you said but it barely did anything. I can use the work station and daily action dropdowns now, but everything else is still broken. Meaning, everything from the "extract milk" checkbox onward doesn't work still.
Seems these two guys are having a somewhat similar problem, but no solutions that work so far...
The second one, the one about replacing every instance in the file... I don't think I understood your instructions , but although I believe I managed to get somewhere close, the save file, like, resets when I load it? Like it's a new save, tutorial, no slaves or items. Really weird.
So in the end. I'm not quite back to square one, but close. I really wish I understood this stuff better :/