If nobody will know a better way:
Export your track to a csv file, change the data in the desired row(s) (lat / long) by adding or substracting whatever you want an use the manipulated csv in Reefmaster.
How you have to change your data, you could calculate or just use two points in your area and see, how you have to change all your data.
An example, measured with two points in Google Earth. If you add 0.003 (seconds) to your latitude data (for my home area this is the correct count), all your data move 3 Meters north.
47° 50.471'N - 12° 28.636'E
47° 50.468'N - 12° 28.636'E