I've installed this plugin and it works fine with Paint.NET 4.0.
Even though its great to install a lot of plugins at once. I hate piracy that the author of the pirated plugins clearly noticed.
I've scanned all the files related to the plugins with BitDefender and there's nothing harmful
I contacted them and asked them to explain it. Hopefully they'll respond soon
http://imgur.com/e83TGCJ
I already uninstalled the whole plugins tho....