Map Zoom In key in MindMap to different key

I just switched to a new Mac and installed MarginNote3 again.
On my old iMac the Zoom In function for the MindMap was binded on +.
Unfortunately this changed on my new MacBook, here Zoom in is on *.
The Problem is it does not work when I press the key.

I tired to remap the shortcut with the Mac settings, but it does not let me.

Is there maybe a fix to get the keyboard shortcut back on +? :slight_smile: