Oh no!

I screwed up Paint Tool Sai!
I was trying to download brushes into PTS but I think I screwed up and now I can't get on it!

Whenever I click on the icon an AVG popped up saying something about a virus.
So then I did a scan and it picked up a few viruses.
I think I ruined it for good...
Now when I click on it says problem with short cut and it asks me if I want to delete the short cut.
What do I do?

EDIT: Sai is working fine now. The brushes I was trying to download was bugged. Now I can get back on Sai and work on projects :D