After upgrading to Basecamp 4.2.1 I have some problems related with the elevation data:
== ELEVATION GRAPH ==
Right click over a TRACK -> SHOW GRAPH
I only see the option "Course Over Ground"
== ELEVATION DATA IN GPX ==
File -> Expot selected track... -> mytrack.gpx
The track file doesn't contain any elevation data. It works good with waypoints.
I didn't have these problems 2 weeks ago. So I think is related with Basecamp update...