Increase decimal precision homeport

Hello
How can i increase the decimal precision in homeport when i calculate distance between two points in gpx analisys?
I need to calculate distance and average speed bettween two tacks in sailing.
When loaded the gpx, in Properties it's very easy... but in summary i can read distance only with 1 decimal... like "0.4" nm and i can read average speed only like "6 kt" without decimal.
I need more precision and more accurate values. It's possible set in homeport more decimal in distance and speed?
Thank you in advance