ScaleXtreme Xpress is a free version of the ScaleXtreme product. 

It is limited to a Single User, and has only one default Role. Because of this restriction, you can only be logged into ScaleXtreme Xpress from one computer at a time. If you have logged in from your home system, then attempt to log in from your work system, the session on your home system will be terminated and you will be automatically logged out.

For people needing multiple admin access to ScaleXtreme, you should upgrade to ScaleXtreme Xpert.