I have the exact same problem.
Received a serial number email from Wholly Genes.
Used that and everything worked for 30 days - then I get a Trial Expiration error.
When I click on the About window - it shows my correct name, correct email address and correct serial number.
I then use my registration email to, again, register the software and get the window confirming my registration.
Then, 30 days later I get another expiration notice.