Thanks Jeff. Got it, but having read the info on how to replace, disable SIPS, etc etc, and on each update doing it again, I have given up the idea and will just have to live with the rather boring, IMHO, icon we have got.
It's dead easy to do. Right click app icon, go to Get Info. Unlock the pad lock at the bottom right of Get info screen. Drag the replacement icon over the present icon at the top of the Get Info screen. That's it!
But yes you will need to do this when you update, But literally it takes seconds to do!
You need to work with the moneydance.app in your Applications folder (not the one in your dock)
When you drag the icon I sent earlier as you move it over the original icon you will see a green Plus sign pop up. Drop the replacement icon when you get this.
This will also work with the png file DWG sent, but his is a very low resolution image!
I am not working with an alias or have changed the app name. I may have been using Forklift instead of Finder to take the screen grab! I also had show ALL file extensions switched off. This is what I get using finder on the app folder icon - before and after. The ICO icon appears when I drag your file onto the icon at the top left of the ‘Get Info’ box!