So I downloaded IconChanger and made a backup of the engine icon and created a new one for my project.
When the game is published, it doesnt change the icon when the game is running or in the tray, but it does for the exe file.
However when I compile it into an installer, I can overwrite the tray icon - Just not not the preview icon (by which I mean if you hover your mouse over an inactive / active window in the taskbar a preview is displayed) The icon displayed is the Acknex icon.

How can I overcome this?

I read there is a SED Plugin for this, where can I find that to try it out?