I bought an IDE flash module with Level 3 and now realize I need Level 4 for a Cyclades card. Is there a way to upgrade the license key and just pay the differfence instead of waiting for a new flash module to arrive?
yes, if you have an account on mikrotik.com then simply log in and check in work with keys. if you see your key there, then simply use the upgrade key button. for any help, contact support@mikrotik.com