Your add-ons were installed alongside Smokeless Range 2, in the location determined by the install option you chose back then ("For me only" or "All users"). If you installed version 3 with the other option, version 3 is in a different location than your add-ons, so they will not appear in its menu.

First, check where your add-ons live: right-click your old Smokeless Range 2 desktop shortcut, select Open file location, and note the path:

  • C:\Users\(Your User Name)\AppData\... → it was installed with For me only
  • C:\Users\Public\... → it was installed with All users

To fix it: uninstall Smokeless Range 3 through Windows Installed apps, then reinstall it choosing the same option shown by the check above, so version 3 lands in the same location as your existing add-ons.

Do not browse to or type an installation folder — choosing the matching option automatically installs to the correct location.