Workaround: Create a .reg file like this and load it into the registry:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Ascential Software\DataStage Client\Director]
"StopRefresh"="1"
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Ascential Software\DataStage Client\Director]
"StopRefresh"="1"