Those files are tag databases used to prevent doing too many requests on sources.
They are automatically generated and contain all tags with more than 100 images at the time of the generation.
To use them, rename them to tags.db and move them to:
C:/Users/%USERNAME%/AppData/Local/Bionus/Grabber/sites/%SOURCE_NAME%/%SITE_DOMAIN%/tags.db
Note that not all sources require a tag database as they might already provide the tag type information in the listing API.
Date: 2024-08-21