I have been using megasync and last week my 'live' laptop messed up the song database and then synced it. fortunately mega has versioning and I was able to get the previous version back.
what about using batch files or something to copy to and fro…
@Phil - to sync. Both laptops would have their data in /users/public/onedrive/openlp. It's extremely unlikely that both would be in use at the same time. I prepare the service at home on one laptop and then run it at church on the other.