There was a problem on the JetBrains site yesterday where it would erroneously not allow some license keys for upgrades. I also bought my IDEA license in the end-of-the-world sale last year, and the site wouldn't accept my key for an upgrade.
I wrote a note to JetBrains sales with the details, and they sent me a custom quote for the upgrade price - and it also looks like they fixed the bug in the site.
So try again with your original license key and you should be able to get the upgrade price. If that doesn't work, write to sales like I did and they will fix it for you.
I wrote a note to JetBrains sales with the details, and they sent me a custom quote for the upgrade price - and it also looks like they fixed the bug in the site.
So try again with your original license key and you should be able to get the upgrade price. If that doesn't work, write to sales like I did and they will fix it for you.