I was able to repair this by drilling down into //home/user/.local/share/applications and modifying the code in “check MAC.desktop.” I modified the code to read:
[Desktop Entry]
Version=1.0
Type=Application
Terminal=false
Exec=/usr/bin/anonsurf mymac
Name=check MAC
Comment=Print the current MAC address
Icon=network-server
Categories=anonsurf;
I don’t know if this was the best solution; but it’s working correctly now.