What do I need to open the software in more than one computer in a server-client setup?

Simultaneous software access: client points

In order to be able to open the software simultaneously in as many computers as required, what is needed is a client point of the module for each pc where the software wants to be opened. 

EX: If I have a server and two clients and I want to open the software in the 3 pc's simultaneously I would require 3 client points to do so. 

Otherwise, the software can be installed in as many computers as needed, but the application won't open in all of them at the same time. It will have to be closed on the other laptops to access it correctly in one. 

Contact your reseller to acquire more client points for the specific module that wants to be opened in all the computers.