Since you have the beta installed, the trial period will be expired.
The only solution is to buy the program. If you don't want after a reasonable period of testing, Wholly Genes will give you a refund.
Be sure to remove all traces of the TMG8 public beta before installing the release version.
I installed the Beta, and used it once in the trial period, so haven't had a chance to assess the new version prior to a possible upgrade from 7, hence my question, as I'd seen that others had the same issue.
Seems that what you are saying, that those who installed the Beta cannot now install the 'Trial' downloads without a purchase.