Did you lose everything? The authorization code, manuals and everything? Which Digidesign hardware are you using? If you still have the Authorization code, you can purchase a replacement CD at the online Digistore. There are also several upgrades available there, including 6.4.1 for the 001, and higher for other interfaces (again, you didn't mention which hardware you were using). Depending on what hardware you are using, and your computer compatibility (be VERY SURE you check it), you may want to consider purchasing one of the newer versions.