.Go here to purchase via Skrill.
Purchase upgrade from CREV
To upgrade your CREV account to include GTO+, please transfer $50 (or €40) to email@example.com
Should you be prompted for a name to verify the transfer, then please enter “Scylla”.
If you experience any difficulties, then please contact support.
Terms and conditions regarding upgrades
This upgrade is only required for users who purchased CREV before 1/1/2015.
Purchasing an upgrade will upgrade all licenses in your account, including second licenses.
The upgrade is life-time and does not expire.