I have used many versions of Parallels Desktop and until Version 13 I could happily change the Winapphelper.icns icon to something Mac Dock suitable for any running Windows program that appeared on the dock. I did this by replacing the Winapphelper.icns in the Resources folder (via Show Package Contents) for the windows program in question with an icns file of my choosing. All well and good, it works! (Please don't reply telling me how to create an icon ... I know!). The problem with Version 13 is that every time I close and re-open the running Windows program for which I have lovingly created a beautiful custom icon, Parallels overwrites WinAppHelper.icns with the original ugly Windows icon with two red bars through it, as before. Clearly this is not exactly a problem of function ... everything works ... but since using a Mac is in large part about the aesthetics of the thing, Parallels 13 constantly forcing ugly icons on to the Dock is a real pain. Simple question ... is there a way (like before) that I can change WinAppHelper.icns and it will stay changed?