Root ssh to cerbo gx with touch screen and Signal K admin user and plugins -

I tried many times to update signalk plugins and always failed. I kmight be the storage. I actually realized in my cerbo gx bith the internal SD card and the internal bluetooth not resport so I isntalled a tp-link ub5000 ubb bluetooth and a 64GB fat32 formatted usb card. anyway by mistake I did downgrade my signal key user to user from admin so now I cannot access signalk admin anyore to try to reinstall plugins. I ahve 300MB left on main cerbo memory. the issue is not that I would like to get SSH acces to cerbo but I cannot I have the touch screen 70 and I tried When using the New UI, select, drag down and hold down the entire list of General menu entries for five seconds, and until you see the Access level change to super user. but either does not work or I do not get it can you ppolease help? BTW i am on my mac and trying to connect locally SSH and connection is refused Venus OS: Root Access [Victron Energy]