Hopefully it will be available in beta 2, but initially, this is how
AntiSpywares original developer GIANT developed the product, to be a single
user application only.
From Steve Dodson:
You have a limited user account running the application looking for spyware
on all files and folders. This includes the administrator account which
limited users may not be able to access. So we have to approach this
carefully in order to remove the spyware from all locations, but also
preserve file and folder permissions and access.