thanks for that

i have:
- downloaded the australia 2015.10 gmap
- unlocked it using "unlock mapsource" and moved to C:\ProgramData\Garmin\Maps
- installed basecamp
- loaded the 2015.10 map file from the Maps menu in basecamp
- clicked Maps > Install Map to device

however once it has been installed, in the devices section in basecamp, it still says i only have the 2012.2 version installed which is what the device came with.
Trying to install and customize again, shows the 2015.1 map being installed as well as the 2012.2 version.
I can untick the 2015.1 but i can't untick the 2012.2.
How can i make sure that the maps are running on the 2015 and not 2012?

THanks