Hi Cheryl,
If you want users to be able to access Client Receivables, Quik Invoice for Windows, or any of our other 'Windows for Plus' products, then you have to install the product to a network drive, along with the workstation setup files, and then run the workstation setup for each station you want to be able to access the program.
If you want more than one user at a time to use the products, then you would be required to get a multi-user lanpac to allow that. This lanpac is different than the one that works with the System Manager.
Also, if you want to add users with new login names and passwords, then you need to open one of the products, logging on as the System Administrator (SYS / SYS), and set up the users from there, User setup under the File menu.