Do you set the environment variables PTC_WF_ROOT / PTC_WLD_ROOT to control where the WWGM Workspace and configuration files are stored for the user, or do you not set them and allow the WWGM to save its workspace and config data to the user's Windows profile?
If you have set them to a location that is not unique to the user and the administrator has written files to the location (by registering the catia application in the WWGM) that the user then can't read, you might see the problem that you are seeing.
We don't use the default location of allowing the WWGM workspace and config to be stored under the user's profile directory because with long file names, you can over flow the 255 character path limit. To avoid this issue we set them much nearer the root of the user's drive, but we set them to be user specific by using the user's USERNAME variable so that each user who logs into the machine has their own WWGM config and workspace location:
PTC_WF_ROOT=C:\PTC_TEMP\%USERNAME%\uWGM
PTC_WLD_ROOT=C:\PTC_TEMP\%USERNAME%\uWGM
Rgds
Gary