Thanks! this works.
Just to clarify, courses are found under training
connect.garmin.com > Training > Courses
Just followed instructions from 8113683 and it worked perfectly. I can't believe Garmin is not fixing their import app. I tried all the files formats etc. for about an hour, only to find out that no one seems able to make this work. Has anyone at Garmin tested this - ever? Anyone from GARMIN SUPPORT interested?