Used the installer, can't downgrade for some reason, game won't start because of it

I ran the SPT installer because i felt like that would be more convenient, but the launcher keeps complaining about my version being on 0.12.12.18772, despite the fact that i've tried to downgrade it but it won't happen, I can't unzip the patcher directly because it fails at unzipping the actual patcher exe.

Okay but the launcher still complains about the game version. I'm doing a whole reinstall of SPT now, using the installer again.

I joined but my application hasn't been accepted yet.

Okay I didn't actually see the patcher working the last time, so that was probably the problem, for some reason it just didn't run it. /shrug