Implement a way to revoke activations

**Is your feature request related to a problem? Please describe.**
As we are human, sometimes we forget to deactivate the license on machines before we wipe them, sell them, etc, Occupying license activations which aren't really being used.

**Describe the solution you'd like**
A way for an authenticated client - email and license should be enough - to disable previous activations. Maybe revoking all activations, a "pick from a list", or simply the oldest one works as a solution.

**Describe alternatives you've considered**
I tried contacting support, however it goes thru paddle and from there haven't heard anything. Regardless, it is inconvenient for such a simple operation not to be automated. I just issued a refund request although I plan to make another purchase just to get around this problem.