I still have Sendmap 2.0 on my desktop,but I think I didn't used it for more than 15 Years....
I think there is no install package, just move the folder. But you still use sendmap ??
Sendmap is not the same as cGPSmapper. Sendmap is a complementary program for cGPSmapper. MapsetToolkit was a good successor.
User manual cGPSmapper writes:
2.2.3 What is sendmap?
sendmap is a command line program used to transfer vector map files (generated with
cGPSmapper) to your GPS receiver.
Just tried it again with my gpsmap 66s, and yes a single *.img map with a *.typ file can I uploaded as a gmapsupp.img to my gps and is visible