I do own a Arena 6 Licence. It installed normally with Alley included. When I am installing for example Arena 7 Demo or a Avenue Demo additionally for testing reasons..... and uninstall the demo after testing (because I am a Monk)... Alley also gets uninstalled. So I have to reinstall it again.
So it would be nice to have an additionally option not to uninstall Alley within the uninstall process....or that Resolume and Alley are not one packet from the system point of view in general.