FYI I've removed the .dat files from /usr/local/centovacast/system/geoip/ for future releases. That was a holdover from the v2 days and if it was enough to confuse me about the correct location, then I can't really expect anyone else to do much better with it.
We've also added a package to automatically install the GeoLite City database. It can be installed using:
/usr/local/centovacast/sbin/update --add geolitecity
After installing via the command above, every time you run /usr/local/centovacast/sbin/update it will automatically check for updates to the GeoLite City database to keep it up-to-date.