On Windows, if an application installer is built with --win-menu and "--win-menu-group foo" the when it is uninstalled, the "foo" directory will be removed along with any other unrelated shortcuts in it.

for example I have test program using "--win-menu-group Java", and also installed jre 1.8.0_131, which puts 5 shortcuts in group "Java".
Do far so good, I have the 5 java shorts and my test app shortcutsd all in "Java" group.
Then I uninstall my test app and the menu group is gone.