Hardware change: maximum points - (re)activation ?
I've got the same problem concerning reactivation of the MIG-21. I completely reinstalled my computer and doubled the RAM and changed the GPU, so reactivation is required.
Normal DCS: still asks for activation of the MIG-21 every time I launch the game but activation is successful.
DCS Open Beta: asks for reactivation every time but no joy. Cannot fly the MIG now.
Yup, seems to be a problem of the developer because the other modules are working like a charm.