[OH3] Habpanel shows old version after migration from OH2.5 to OH3

Ok, so I got it working by:

  • installing openHAB 2.5.11 locally on my Windows 10 machine
  • loading my backup of openHAB 2.X
  • opening HabPanel → Settings → Edit local panel configuration → Export
  • opening the “new” HabPanel (of the openHAB 3 instance) → … → Import

Ta-da, the $OPENHAB_USERDATA/jsondb/uicomponents_habpanel_panelconfig.json file is updated with the correct content!