Backup your data
GeoTransformer stores most of your data in a single file:
GeoTransformer.data.
You can back up this file using any back-up software. One of the easiest ways of doing so is putting the GeoTransformer folder inside
Dropbox (the address includes referral to the author of GeoTransformer).
Some extensions store their data in
ExtensionData subfolder. This includes cached copies of pocket queries, cache for automatic translation etc. If possible you should back up this folder as well but it is not mandatory.