Good move in going to Resolve. Once you grasp the principles of Resolve (many tutorials available on you tube) you will never go back to the rental Adobe products, It is, in my opinion, a vastly superior product. I have Premiere Pro (CS6...
Had the same, consistent problem, a while ago. Changed to a gmail address and no problems since then. (I had to change addresses as my old service provides changed the conditions under which it worked.)