Sorry to see you go.
ORBTUBE keeps a backup of your edits outside the extension so they can survive an uninstall. Your latest backup should be in:
Downloads\ORBTUBE\orbtube-edits-latest.json
If you reinstall ORBTUBE, open the Contribute tab, choose Restore edits from a file, and select that file. Your saved labels, taught words, Orbit selections and settings can then be restored.