You may want to read the license agreement. I'm sure there is something their about reverse engineering or deconsstructing and while it may be a matter of interpretation I'd be very careful with this.
Which logo do you talk about exactly?
The app icon in explorer? The icon in the window? The splash screen?
e.g. the app logo can be replaced if you use a link to the app and give the link a special icon.
The application icon that appears in explorer.