MapView2 uses a completely different Map-config file ...
(that's why it's called "2" in fact, it stores maps-configs in a YAML file instead of what you got there, bulletdesigner -- this makes it no longer compatible w/ MapView1)
MapView2 --
use the Configurator to point to a directory above your TERRAIN directory.
right-click on the MapTree (left panel in MainView) to add Group(s), Category(s), and then the Map itself ...
A parent-directory for MAPS and ROUTES can be specified uniquely for a Map; otherwise Mapview2 assumes that MAPS and ROUTES are siblings of the TERRAIN directory (as was set in the Configurator)
Please note that in the subdir of Mapview called "ConfigConverter" there is a standalone app that is meant to convert MapView1 map-config file to a MapView2 "MapTilesets.yml" config file ... so you, mudael, could try it by inputting bulletdesigner's MapEdit.dat (iirc) and copying the output file to Mapview2's "settings" folder. It might not work and it (the output) would likely need manual tweaks ...
read through the Helpfile
or you can use MapView1,
Ps, mapview2 is NOT designed to work with 2+ TERRAIN folders ...