I need an editor to edit small Midi files, change the instrument of the tracks, and change the time or the key. I used CakeWalk Express on Windows 98 and also on Windows XP. I could use that version of software (3.0 I think). For Windows 7 I changed Express v8.0 to CakeWalk Audio finder tool, but I cannot download. Can you help me? I have 120 WRK files to open and modify.