I did finally find the data from 4.7 in the users file but the data is not backward compatible to version 4.6. I got an Email back from Garmin with a "work around" to install maps when using 4.7. As mentioned before, they are no longer supporting BaseCamp. I responded that I thought that it was pretty poor to leave the application not functioning properly.
After going through the pain experienced my others, I uninstalled version 4.7 and installed 4.2. I can now download 3rd party maps. The maps were there from version 4.7 but I can't find my data (waypoints, tracks). Can you tell me what file they would be in or did I lose them when I uninstalled version 4.7?