Updated to 2.2.0 but OC still saying I am using 0.6.8

Hi, can anybody help.

I have been running a Mac Pro 2012 with Opencore well for a couple of years. Every time it had suggested an update I did it but didn't really check. Have just had to update to Sequoia and had a few issues with Cubase so was checking and realized that OC says I am still running 0.6.8 even the multiple times I have updated to 2.2.0.

I have read about reset NVRAM, which I did via hold the correct keys at boot and the process seemed to work but no change.

I downloaded OCAT which said there were problems but also warned that it wasn't compatible with older OC patches.

I am not the most tech savvy so any help would be greatly appreciated.