So I noticed you're using Ctrl for many of the modifiers for the shortcut keys in MasterPlan. The problem is that Ctrl on a Mac has different utility than it does on Windows or Linux. Ctrl + Up for example, does not work for me to move tasks because on Mac that's bindded to seeing all open apps. Macs use Command as the main shortcut modifiers. On many apps it's used for Saving (Command + S), it's used for Opening (Command + O) and it's used to select multiple files (Command + Click). So I think it kind of makes sense to use Command instead of Control, for the shortcuts.
For Apps, it's very typical to have an "if" statement somewhere that uses Commands instead on Control when on a Mac.
Even better would be to allow for keyboard short-cut remapping but that's up to you. I'm cool with the keyboard shortcut setup, I'd just like to use Command instead of Control lol
PS: I started to use MasterPlan recently since it seemed more feature complete after the Maps update, and I'm really enjoying it so far! There's a few QoL things that are missing for me though, like better trackpad support (I know, ew, but zooming is hard in MasterPlan with one, and sometimes the 1-5 numbers don't cut it), and being able to word wrap notes...