Shotcut appimage icon not appears after install in ubuntu 18.04

Hi, I recently realized that you have a Shotcut appimage. I downloaded it and installed it, but the application icon is not the shotcut one, but a kind of purple triangle, which appears in the gnome applications menu, ubuntu 18.04. I must say that the correct icon does appear in the dock

AppImage is a new thing for us, and I do not believe it is possible:

This is extremely low priority, and maybe you would like to help. Here is the code:

And here is another AppImage ticket with perhaps some hints:

Hi, I do not believe I acn help with this, I am not programmer. You can contact with @probono, the appimage creator