Evolution Workstation does not hold the settings like IP address etc.
When Evolution Workstation is installed without administrator rights it will not keep the setting like IP address USB port or other settings. This happens with versions older than 4.6.5.
The solution is to run Evolution Workstation as administrator or install version 4.6.5.
Version 4.6.5 can be downloaded.
Please make sure that firmware version 4.5.12 is used in the control unit with software 4.6.5 (is included in the download)