When loading an addon, files ending in .dbs or .backup should be completely ignored.
Relevant discussion: https://discord.com/channels/357945222111428609/357946480063021056/927677604637573120
If a .dbs or .backup file is included in the Maps folder of a pk3, SRB2 will crash with a "THINGS lump not found" error. Instead, files ending in .dbs or .backup should be completely ignored. Those who prefer to work with the new -folder command line argument will encounter this issue frequently since Zone Builder automatically generates backup and settings files every time a map is saved.
Alternatively, users could specify which types of files should be ignored when using -folder.