We recommend that instead of installing new versions of E-txt Desktop that you use our Message Manager product. Simply login to our User Portal and select Applications - Message Manager.
e-txt Desktop is a client application that can be run by more than one person on the same machine.
Running e-txt Desktop on a Network Server remains untested, but as it's verified by Microsoft on a Vista / Server 2003 environment, there shouldn't be an issue with this.
e-txt Desktop should also run smoothly on Windows 7 with Server 2003 as this was self tested by Dynmark for Microsoft Certification. Please note though that e-txt Desktop does not support Windows Server 2008 R2.
As long as a version higher than 5.3.2 is used, with no over-customisation done on user control and access in terms of Windows Users, with compatible Operating Systems, this will run OK.