Just curious... have you posted on eMastercam ??
Noticed a very similar thread, similar solutions, identical frustrations. Back in March ( yeah, I have an acc. there as well).

I've learnt something... that USB hasps are out. My co doesn't connect to the Web, so, Mastercam would need to find a nethasp if ours was kaput. But we are current with maintenance, & our cost would be low.

I only wanted you to test if the light came on.
Pity your reseller can't test it for you.