The only law breaker is the individuals who are packing the plugins into an all in one pack, (you just got drawn into a quick download solution) most will be obsolete versions and as already mentioned, have most likely got spyware and/or viruses, it has been mentioned also that the only safe place to get plugins for paint.net is on this forum. I hope you have learned from this mistake. It may take a while to download all the plugins that you require from here, but at least you know they are up to date and most importantly - clean.