Version 4.1 improved on the basis of 4.0. Added show/hide track in
addition to track removal. Also, the color in which the mobile station
names are displayed can be customized. And you can set up a tactical
call sign, and choose to beacon it instead of youe regular call sign.
In filter settings, you can choose to accept stations in the track
list without manually adding them. This version has improved legacy
TNC support as well.

Thanks, Michael KF6ZDM