The 0 or 1 suffix on the download button indicates the type of the MIDI file: Type 0 or Type 1. Some Disklavier, for example, can only play one or the other type. You should experiment first to see which type is compatible with your hardware.
For a great experience with MIDI files, we recommend the Notation Musician software - which shows you the score as you play the file! Click for a full description, or you can get a trial version, or you can buy the program now.