Cannot log into old account.

A similar posting was created a few months ago, and I am having a similar problem.  I recently had to rebuild my computer.  When I reloaded TeamViewer 12 and tried to access my existing account, TeamViewer provided a pop-up that I had to acknowledge my new computer as a trusted device.  No matter what I do, I never receive the emails.  I tried "forgot my password" and other options, but nothing works.  I had to create a new account just to post this help request.  I have multiple remote computers listed in the original account that I need access into.  The other posting did not explain how the problem was resolved.  Please help.