@pclar09 Unfortunately, it is not possible to upgrade to version 7.0, a new installation is required.
There were a lot of changes to the system, it’s practically a new system now, so there was no way to incorporate that into an update.
This video may be useful:
https://www.youtube.com/watch?v=skeULeTu7p8&list=PL2oNQ0AT7fx2ExiSNrfHUzga5GnogI4sh&index=23&ab_channel=Recalbox