I've changed quite a few settings, set up some paths, etc. Whenever I download a new version will I have to redo all that work? Or is there a way to keep my options?

LNM will remove a few and update some preferences. Most settings will stay.

Backup the folder ABarthel here: C:\Users\YOURUSERNAME\AppData\Roaming\ABarthel to be on the safe side.

If you run into crashes when going back from 2.6 to 2.4:

Quote

Going back to stable Little Navmap 2.4.5 after trying the beta

The scenery databases of the new beta versions are not compatible with Little Navmap 2.4.5. Delete the databases files from the settings folder of Little Navmap if you see crashes and exceptions containing messages like no such column. You can find information about the folder and the files here in the online documentation in chapter Databases.

You can safely delete the following files since they can be created again by reloading the scenery library:

little_navmap_fsx.sqlite, little_navmap_fsxse.sqlite, little_navmap_p3dv2.sqlite, little_navmap_p3dv3.sqlite, little_navmap_p3dv4.sqlite, little_navmap_msfs.sqlite and little_navmap_xp11.sqlite

Do not delete any other databases which contain userpoints and the logbook entries, for example.

Alex