Hi John,
Thanks for sending that. I'll get a fix ready for the next release (it will be next week as I'm heading off for a few days holiday with my family). In the meantime, the crash seems to be caused by a corrupt file in your OpenSong/Settings/ folder. There are 2 files that you can delete manually in this folder that should reset the OpenChords functionality for you.
conflictCheck.json - this is the one that is causing the crash. It is created by OpenSongApp to keep track of last sync dates, etc. It looks like that file should be in your folder, but for some reason, it is failing when trying to read it. You can safely delete this. I suspect that this file is there but is either 0kb in size (empty) or is corrupted.
songFolderUUIDs.json - this file keeps a track of your unique OpenChords API key for read/write permissions to the OpenChords server for each folder you synchronise. If you haven't used this successfully yet, you can delete this file as well (if it exists - if not, ignore for now).
If you'd rather not delete them, just rename them to something like OLD_conflictCheck.json and OLD_songFolderUUIDs.json. That way the app will ignore them and create fresh versions
Both files will be recreated when the OpenChords page runs for the first time.
If you do remove the files above, can you let me know if this solved your issues please.
Best wishes,
Gareth