How to reinstall Node-Red?

I am trying to install Node-Red on my HA instance. I followed the official guide and did some testing and probably messed up something, so I thought it would be good to re-install the add-on. I uninstalled it from the UI, then reinstall but now I get some problems:

  • import doesn’t work anymore: after import the flows show up, but they disappear when I navigate away from the Node-Red Web UI
  • the debug panel doesn’t show anything

How do I do a clean reinstall of Node-Red? I also tried to login via ssh, and remove the /config/node-red dir after uninstall, then reinstall. Didn’t help.

Thanks in advance for any hint.