Unusually, a lot of us were in the office today. I will wonder over and ask Ty if the support page problems are known.
As far as I know there is still phone support, and it’s the old number. I’m not sure where you find that, other than in old license emails.
For what you’re trying to do, see if the steps shown here work for you:
https://help.trimble.com/s/article/How-do-I-change-my-email-address