How to add a custom satellite category?

I installed gpredict (last version) with Macports on macOS, I created a custom .cat file with a list of satellites, but if I put it in the same folders as the others (opt/local/share/gpredict/data/satellites) it doesn’t show up in the categories list when configuring a module.
Any hint? Perhaps it’s not the right folder I’m using?

sorry I found it myself: it’s ~/.config/gpredict

I would suggest to add it to the github readme, because it’s not easy to figure it out