It does this by using the following command to dump all the profiles to the current %TEMP% directory
netsh wlan export profile folder=%TEMP%
Then for each line of the output finding the filename of the profile and downloading it. To tidy up the file is then deleted from the directory.
The profiles are stored in the .msf3/logs/scripts/wlan_profiles/ directory.
To re-use the profiles they can be imported into another Windows box by using the following command
netsh wlan add profile filename="the_filename.xml"