Yeah, maybe.
Oh well, Thankyou both for your help!
I allways back up my versions of paint.net before it updates just incase something goes wrong so I still have the older version attached to my PC and that seems to work fine with the scrolling. So its not the end of the world : ).
Until I have a change to update to windows 10 or the next version of paint.net comes out i'll stick to the older model.
Once again thankyou!