I have tried to use Garmin basecamp with my fenix 6s pro. Loading maps from device is very slow, after initial load (over 6 hours) the maps are still too slow to use, the software is useless with current state. I hope you can fix compatibility issues with Fenix pro watches. My BaseCamp version is 4.7.1 and my Fenix 6s pro watch version is 9.0.