Hi,
You mention that the user is able to right click and receives the menu, is the user able to select (Edit or Edit Style perhaps) from this menu?
You may also try removing the DialogPos Folder in the user’s registry. This can be done by selecting Start>Run>regedit. Within the registry navigate to HKEY_CURRENT_USER>Software>Bentley>CivilEngineering. Then delete the DialogPos Folder.
Thanks,!