Idk why, it just stopped working. I got a trojan called msa.exe. It's gone now though.
I noticed afterwards pdn wouldn't work. I clicked the paint.net repain tool and that no longer worked eigther.
The whole paint.net folder was broken! I am not sure what it's from... So I deleted it and I am trying to install 3.5.1, but it doesn't work. When the .Net framework is installing, once it gets to 40% it closes for no apparent reason.
Btw, I am using vista. Please provide any help you can, thanks