What's in the zip file if you pay more? A .tap or .tzx file? I really don't like bare snapshots; a .tap is a far better alternative with a much wider range of potential uses.
@Richard - on line 3, it has a save routine, break into it on the main menu, type GOTO 3 and load a blank .TAP into your emulator and set it to record mode.
having your programs as .TAP like Richard says affords more opportunities for loading it back on real machines, using TZX players, DivMMC devices and the like.
