Hello, We have 3CX V12 that we want to upgrade to V15. We bought a license for 15. In my 3CX panel i can see that the maintenance period is expired. The old key in my v12 is the same as the new one we received... Can we update V12 to 12.5 and then update to 14? If i can update, here is my 2nd question. Should i first take a backup of my V12, remove the 3cx and install 12.5. and do a restore? Regards.