I Have the same problem. I use the 6.2 Alzex Pro Version , recently i bouth a new pc with windows 11 and i want to install that version because i bought it in January 2021. When i try to activate it It gives an error: to many activation.
I was surprised because I remember very well that I have only used the license that i bought twice. When I first installed it (January 2021) and when they released an update that same year wich it was covered by the license itself, because it was before the year was up.