Exported, cleaned up references to mongo and all better. No Mongo.
Export the database (this uses the running database, so I had to have Mongo fixed)
cd /opt/meshcentral
node node_modules/meshcentral --dbexport"
Go in the config file and remove the "mongodb" line(s) in settings
nano /opt/meshcentral/meshcentral-data/config.json
Restart meshcentral
systemctl restart meshcentral
# or
/opt/meshcentral/mcstop
/opt/meshcentral/mcstart
Import the database
cd /opt/meshcentral
node node_modules/meshcentral --dbimport"
Restart meshcentral
systemctl restart meshcentral
# or
/opt/meshcentral/mcstop
/opt/meshcentral/mcstart