I purchased this product.
Full stop: commercial products are not supported here and the plugin developer knows that.
Then you need to take that up with the site you purchased that from.
Side note to the developer:
@killerdeveloper (Pawel) The title includes "official webfonts plugin" I really truly and deeply dislike that plugin name. Official what? That's borderline deceptive IMHO.
*Drinks more coffee*
Sigh, just my pet peeve. But seriously please consider using a smaller plugin name that is more open and descriptive. You can put all the ad copy in the readme.txt file (within limits) as you see fit.