Ok, so far I had one crash, roughly after 15-20 minutes of working, after opening C2 that was updated to beta r268. I am not sure what caused it, though. I was just adding a new action when C2 suddenly froze and closed itself without any error. Just like it happened before. I checked out the autosave that was made close to the time that it crashed, and it seems like it works fine, on the first look.
P.S. I can confirm, though, that UI elements, that were previously bugged, now work fine.