UBB.threads is currently owned by UBBSystems, it has changed hands several times since you bought your license.
The download and support links can be found on our sidebar here at
UBBCentral; for a quicker reference, the links are
Member Area and
Support Desk.
As for support on these forums, these forums are utilized as user to user support; everyone here (including the moderators) are users or volunteers, the only official support offered is through the support desk.