Capture Argo licences have stopped being upgradable upon the release of Capture 2021 on the 9th of March 2021 so you need to buy a new licence if you wish to use Capture 2021. All Argo users have been informed through email prior to this change. More information on our licencing policies can be found in the link below
https://www.capture.se/Buy/Licensing
Your Capture Argo licence will remain operational, and our licence servers will be serving licence key file unlocks as usual.