Designer 5 Rel 1.0 not functioning on 3 GB-User/1GB-System.
InfoChannel Designer 5 FAQ Solution #4, Designer 5 on 3GB User 1GB system split (last modified 02/02/2007):
InfoChannel 5 Designer, Rel. 1.0, does not function on machines with more than 2GB of system memory where the memory map has been configured for a 3 GB-User/1GB-System split.
The basic GUI does come up--however most/all playback operations appear to be non functional.