The CVS branch under Configuration - Integrated Applications - Version Control Systems includes the following option for CVS:
Full path to the CVS binary
By default this field is populated with the path to the CVS binary if UEStudio detects this when started. If this is not automatically detected, the user may type the full path to the binary or use the browse button to navigate to the appropriate folder. If the CVS binary does not exist on the system, the necessary files may be downloaded from the Internet.