T4A update maps not in Basecamp visable but its visable in mapinstaller

Small issue I have on my mac

I would like to update my Tracks 4 Africa Maps ( This action is by clicking the gmapi map, which launches the map installer; I installed the map, and the version is correct as displayed in the map installer. I also checked the dir of Garmin on the Mac; you see the same date on the map. However, when opening Basecamp and selecting the map to work in, it shows the old version. What to do. Chris