Plutonium

I also don't know how to completely wipe plutonium off of my pc, even after deleting the plutonium folder in localappdata the "run an updater" persists.

Tried doing the first thing and nothing happened, still the same.
Tried the second thing and now after the first error it says "not up to date, critical files missing, run an updater" or something like that, point is, I don't know where to find an updater? Don't even know if it exists, couldn't find it in the site. for dns I have already changed dns a long time ago, months ago before downloading plutonium. I've already played a few times and had no issues, now all of a sudden not working properly.

I'm getting this two errors, the first one is when I launch plutonium, where after clicking ok it runs plutonium in lan, the second one is when I try to enter username and password (both are typed correctly btw) after clicking enter.
Have no idea whats going on.