No, no auto-backups 😱.
I've only seen this when upgrading from old pinballx (xp version) to .net core version.
Installation sees it as a new version and if you put it on top, it overwrites the pinballx.ini and some default database files.
If you use DBM, backup files of your database files are created and can be restored by dbm.
But all your media, filters, groups etc should be on disk
If you can't find any good copy of your pinballx,ini on disk, you need to setup your complete configuration again of pinballx