Set MATLAB as default for .m files in Ubuntu without opening an empty editor

According to the previous thread, MATLAB can be made to open .m files by default in Ubuntu by editing the matlab.desktop file (usually in /usr/share/applications) and changing:

Exec=matlab -desktop

to

Exec=matlab -desktop -r "edit %f"

https://uk.mathworks.com/matlabcentral/answers/565784-defautl-to-open-m-files-in-matlab-linux

This has the side effect that opening MATLAB from its icon causes an empty editor window to be open. Can anyone advise how to avoid this? It looks like using X-Ayatana-Desktop-Shortcuts may help, but I cannot figure out how to make just opening the command window the default and opening the editor to happen only if a file is specified.