Thank you for purchasing an upgrade, we really appreciate that.
In Synergy 3, the new serial key should be downloaded automatically when signing in.
If you have previously activated another key in Synergy 3 we have a help article that provides steps to change the license key:
When you upgrade to Synergy Ultimate, a new serial key is generated in your account after you purchase the upgrade. In Synergy 1, the new serial key is not downloaded automatically, so to take advantage of the upgrade, you'll need to use the new serial key in your account.
Follow these steps to use the new serial key in Synergy 1:
You should now have TLS/SSL encryption and you should see the padlock on your main window to show that your connection is encrypted.
If this article didn't help, you can talk to someone on our support team (unless we sent you here, in which case please reply via the ticket you already have open).