The default FoV in Recap is 45, but 30 degrees is more realistic. At least on my screen. When I change it it'll return to 45 after opening a new or the same file. The same is with a Units change from Meters with precision 0.000 to Millimeters 0.
It would be nice to adjust the default Settings and that the changes afterward will be saved based on the file (maybe in the RCP?).