blank labels in the context menu in the process designer window

Hi,

I am using Windows 7 and  a livecycle workbench version:

Adobe LiveCycle Workbench ES2
Version: 9.5.0.0.20100908.1.247189

The context menu is blank in the  process designer window . I can see that there should be menu items but without  text labels, so I can't work with a process because I don't know which is which. I added "-Dosgi.nl=en" to workbench.ini and set local regional setting (from control Panel) to English but it didn't help. There are no exceptions in the .metadata/.log.

Any ideas?