I’m using ST4 on a Mac. I purchased a license through my company’s IT department in October of last year. It worked until a few days ago, when I got the “Your license key is no longer valid, and has been removed” message.
If I enter the key again, I get a “Thanks for purchasing” message. Then the “Your license key is no longer valid, and has been removed” message pops up again a short time later.
How can I troubleshoot this? I haven’t had any hardware replacements recently.