Does your PC have an "administrator" account? (You didn't say which version of Doze you're using). The administrator can open anything; it shouldn't be too hard to track down where the stuff is stored - log on as the other user, and see where its default "save to" and its default address book and stuff are, then, as administrator, go to the corresponding subdirectory for the user that has the broken OE, and retrieve your stuff.
You could also uninstall OE, purge the registry, and reinstall OE, as long as uninstallng it doesn't erase all the files you want to keep. =:-O
Good Luck! Rich