SenseiSensei_Sensei

I just got paint.net because I wanted to make shirts on roblox. I tried to use the clone stamp tool to cover up something and it just doesn't work. I looked up many turorials but It just wasn't working. So I ended up using the eye dropper tool and trying to color over it and none of this work either..... it got to the point where every tool wasn't working at all. It might have something to do with my layers or something but idk. I have windows seven.