This product is the Dungeon Master Assistant for Windows.

It should contain 6 files:

     DMA20_A.ZIP
     DMA20_B.ZIP
     DMA20_C.ZIP
     DMA20_D.ZIP
     DMA20_E.ZIP
     DMA20_F.ZIP

All these files are required, unzip them in the same 
directory then start windows and execute SETUP.EXE.