Scrivener quits unexpectedly upon activating license

I’ve downloaded Scrivener to a new iMac. When I try to activate the license from my previous purchase, the app quits.

They can’t deal with Licensing issues on this open forum, so you should contact them directly. They’ll also need to know which version your original licence is for and when you bought it, as eSellerate, their former licence managing site closed down and they have moved to Paddle.com and that may be at issue.