Hang on… when you say update, do you mean updating via the settings menu, or the larger more involved update script mentioned in the earlier posts of this thread?
If it’s the former, that probably wasn’t an update to 0.5, and instead an update to the launcher that was expecting your system to already be at 0.5.
Another user made a thread with this same problem. Sounds like it’s something that needs to be addressed and made more fool proof.