DME is a sort of notation software for .MUS (my own music format) files. MUS format is a text only music format that everyone can read or write (for a complete description of this format go to this page). You can load a MUS file or just use MUS file in clipboard (if you produce it with DGS).
DME write staff and tablature deducted by MUS file using a particular Algorithm of fretboard mappig, simpler than DGS one, but smarter than anyone else I've never seen.
It's also possible to import a MIDI track, a MUT file (MUS extension within tablature information) or directly an ASCII tab. As you can see you have a lot of source (when you import a tab, fretboard info could be lost, if you have to work on tab use DTV).
If you want to edit a MUS file you can use a Simple Text editor. With DME you can play it seeing staff, play original MIDI, play from a custom start point. Then you have some tools to elaborate globally your MUS file.
You can quantize and transpose customly, alter tab tuning and automatically all updates are done. With the combo on the right upper corner you can modify the number of measure shown. With a mouse right click you can access menu to play from current measure (the first actually shown) or copy shown measure as MUS, MUT, ASCII tab or BMP to paste somewhere (I use for my coursewares). This application is very useful to analyze MIDI tracks and to export in a graphic format music staff and music tablature.