Not to start an argument...No danger of that--today :D
The same goes for my beloved 1490T.
if I can get my map source installed on new PC (another garmin drama)
Not to start an argument but just for the record, as Falagar and at least one other developer have stated, there is no file compatibility with Mapsource. The only thing they "reused" from Mapsource was the .GDB file extension. I wish they had not done that because it only creates confusion, to no useful purpose.
The select tool is used to select waypoints, routes etc showing on the map.
To install a map to your Etrex, and with it connected and showing in Basecamp's left hand pane just right click the User Data folder and select 'Install maps'. That lauches MapInstall.
Or you can just go the Garmin folder in All Programs and select MapInstall :)
As for the routing, check the Routing Properties to see what avoidances are set. Utilities>Options>Activity Profile, choose the relevant profile and look under the Routing tab. As for your nuvi, it will also select the route depending on the route choice and avoidances you have set. I always check my route before starting off as sometimes local knowledge is better than blindly following the GPS :)
I'm used to Mapsource where you can select parts of a map and send that to the device so I have not had the need to use MapInstall.