Downloaded CN EU 2015.20 via Garmin Express, which told me I'd have to use Basecamp to transfer the mapping, and even though the Progams and Features says 4.2.5 is still installed, Basecamp fails to start up, just as if I'd installed 4.3.x :(
No error message. If I was to guess I'd say Basecamp 4.3.x is bundled into CN EU 2015.20 as Basecamp fails exaclty at the same place, ie after the geotagged pictures are loaded / loading.
Deleted Basecamp 4.2.5, and then tried loading 4.3.5 and it doesn't load and 4.2.5 won't load / show in the Programs and Features until 2015.20 is deleted.
4.4 beta spends a few seconds on checking the list data files, a few more sconds in task manager doing something, then nothing, ie nothing in task manager or on the desk top. 4.2.5 opens ok. 4.4 beat won't open with 4.2.5 open as it says there's already a Basecamp application open.
More weirdness, CN EU 2015.20 seems to have disappeared when I connect the Montana to Garmin Express, but is dowloadable for another Garmin GPS. Posted this also in the Garmin Express section as well.