If you can see your current Ultimate license in Avid>My Products, you should be able to “Extend current Subscription or Perpetual Support plan by 1 year” - (option 3b) – as described here:
https://avid.secure.force.com/pkb/ar...n-Registration
If you’re selecting the purple button “
Extend my existing Pro Tools by one year – view options” and nothing is happening, Avid’s Kyle Splittgerber can fix this for you – hopefully tomorrow, as it’s about 9pm in CA right now (and about 6am in France!)