Hello, I have an SDL Business Manager Lite license obtained with SDL Trados 2019.

The unused license and license key are clearly visible in my SDL account.
I upgraded to SDL 2021 and downloaded the SDL Trados Business Manager v2021.5.3.1 Lite plugin (and uninstalled the previous version-2019).
When I click on the Activation button in the SDL Business Manager Lite view (within Trados Studio) nothing happens, no pop-up window to insert my current license.
Another question: Is my current license key valid for SDL Trados Business Manager v2021.5.3.1 Lite? Note: Only SDL Trados Business Manager v2019.5.3.1 Lite is available for download in my SDL account

Kind regards