mapping software doesn't communicate with a satmap. you have to use satmap's satsync software - free to download off their site.
export the route as a .gpx file
open satsync and import the gpx file where you want it to go.
in reverse to get info out of the satmap. convert the .map (satmap's file format) file to .gpx when exporting it and then load that into memory map.
you must connect your satmap to satsync from time to time as this will automatically update any firmware changes.
if you haven't exported anything from your satmap yet be aware that the unit writes trackpoints constantly and i don't think you can vary their rate of recording. the gpx you export will contain thousand of trackpoints (for a reasonable walk possibly 10,000 or more of them in a large gpx file). unless memory map has a point filter (gets rid of extraneous points not required fro the route) you may find using these a bit of fun. tracklogs has a point filter and i can smash the number of gpx points well down - from 10,000 to 300.