Putting the below content into a file in ~/.local/share/applications/Simplify3D.desktop sorted this for me on Ubuntu. [Desktop Entry] Type=Application Version=0.9.4 Name=Simplify3D Comment=Simplify3D Icon=/opt/Simplify3D-4.1.2/icon.png Exec=/opt/Simplify3D-4.1.2/LaunchScript.sh Terminal=false Path=...