As The Hit List seems to be abandonware, I've switched to
Obsidian which keeps everything in markdown files. To migrate my old lists, I wrote this simple
converter that will create a markdown file with a bulleted list for each list from a .thlbackup.
To run, you will need SWI-Prolog (tested with 9.0.3, but any recent version should work), then run
./convert.pl [path-to-thlbackup]
This will dump the markdown files in output/ under the current directory, which you can copy into your Obsidian vault.
- https://github.com/joeybaker/the-hit-list-migration for conversion to Things app