MapInstall 4.2 (May 2018 update) won't install third party maps

[bnydegger]

Thank You 93ToyTruck! Thank You! Thank You!  Your technique got back for me the capability to load a transparent overlay map of all the hikes (garmin tracks in the 100's) and waypoints (in the 1,000's).  All of these were created using GPX2IMG.  I was so elated that I donated $50.00 to GPSFILEDEPOT to thank them for the maps and forums.