I am pretty sure it was with this account, I have not had any other account.
My VirtualMin Pro started giving a red banner warning a while ago, I think that was when my 2 year early adopter period ran out. I didnt renew it then and posted a question about if I could renew it later when I had more funds and would I lose functionality while I waited.
The answer was that it should all continue working OK and that I could renew it later.
I think I may have lost some functions but backups continued as normal.
Maybe when the red banner came on, the license was de-associated from my account?
I am sure your accounts will show that I did have the Virtualmin Pro license and it would have been purchased around the time I created this account.
One proof that I had VirtualMin Pro is that I have been doing the backups to AWS via cron job and I get emails from the system every day
Backup is complete. Final size was 2.86 GB. Total backup time was 3 hours, 17:55 minutes.
Sent by Virtualmin at: https://heavyhoster.com:10000
Creating backup for virtual server blog-start.com …
Copying virtual server configuration …
Backing up Cron jobs …
… none defined.
Copying records in DNS domain …
Saving mail aliases …
Saving mail and FTP users …
etc etc etc
I dont know how to find this old Serial number
and License key.
Even if I do find it, maybe it has been marked as invalid now : (