Tried all that no change - in Terminal the ...kext line reponds with com.apple.quarantine

When you uninstall the SoftRAID driver, SoftRAID volumes will not mount, but when you run SoftRAID again, they will mount normally

So have done the uninstall / install cycle a couple of times & different ways - assuming it was correct as serial no: went etc. No change , no sta...

Do I need to back-up my volumes/data before trying this or will it pick them up ok after a reinstall?

You must select the system volume you are reinstalling the driver into. Drivers are inside a system, not on disks. See if that helps. Yes did ...

Just updated to Lite 5.7.3 as had the same problem in 5.7.2 and still have the problem - & re-install driver option is 'greyed out'.