Yeah, wrong sub-forum….
However, have you tried loosening the pivot screw along with loosening (not taking out) the other screws?
If not, try that. And while they are all loosened, wedge a Q-Tip or something similar to center the blade. Then tighten the pivot screw, but not completely, then tighten all of the other screws completely.
There are videos on YouTube you can use as a reference as well.
Welcome to the forum.