Best way to restart from scratch Zigbee2Mqtt configuration?

Hello,
after changing dongle once and moving to different host twice, my zigbee network has too many issues not to try the extreme solution: starting from scratch and re-pairing all the devices.
The question is, what would be the best way to get rid of any residual of the old zigbee2mqtt databases, files, configurations?
I would also change channel when recreating the network to make sure…

I’d simply uninstall Z2MQTT (no need to uninstall MQTT itself if you’re using the same user/password).

Following that, I’d remove everything which persists in the z2m folder, restart HA & start the install all over again

Thanks, I’ve been out some time and I’m still chasing some spare time at home to do this.
What about the /share/zigbee2mqtt folder? I see the actual database.db file that is updated continuously is there rather than in /config/zigbee2mqtt

I don’t have anything in my /share/ folder:

This might explain the issues you have - maybe you used an incorrect path when installing/configuring Z2M. All my Z2M data (including the db file and its corresponding backup) is strictly under /config/zigbee2mqtt