I want to scan only when I choose to scan, not everytime pvd opens.
Actually I feel stupid, I did not realize that I could save the folders, but not tick the box that says "scan everytime pvd starts".
Still, the only way to scan when I want, is to tick the box, close pvd, open pvd (do the scan and everyting) then untick the box before closing pvd again.
A "scan favorites folders now" button would solve this workaround.
EDIT: By playing with it I just realize that it DOES it!
I must have waisted so much time going through the ticking process...