Yes, merging accounts worked for me! I had an account for years and decided to buy a subscription via paypal.
So when I logged in, there were no changes at all, couldn't download anything etc.
I did what milksama said and it worked, so thanks a lot!
Edit: I am talking about a wincustomize account with unlimited downloads. So if anyone has that same issue and you used paypal, do what Milksama said; merge your accounts.