Unlike other Managers the Grid and Axis manager will cause a crash if there is no document open and you try to click one of the type of grid buttons. This also happens with the retail version.
In Designer (latest 1.7.1.1)
Launch the program, then if any document is open, close it (them), the go to view/studio/isometric to open the isometric settings window
Then click on the "modify grid" button to open "Grid and snapping axis" window... now if you click on Basic or Advance or Cube, it will immediatly crash.
(Of course, it works fine if a document or an empty page is there)