I just reinstalled my system, I didn't do dump backup but I still have the physical folder of my previous mysql installations.
Is possible to use it to restore and update my current configuration?
It's possible, but not suggested. If I were going to attempt it, here's how I'd do it.
Assuming it all went smoothly you should be set. Now immediately go make a proper back of Mysql so you don't have to do this sort of nonsense next time.