Dear Dave,
Just figured it out.
Glad to hear you got it working!
We're preparing an official guide right now, and more info about what happened in your case would help us help others. Could you help us out? We'd like to post it tomorrow.

When you said, "I don't see any window", does that mean that after killing EspionageHelper and then opening Espionage it would not show the main window (with the black password prompt)?
I had an alias to a file inside the encrypted folder. After killing the EspionageHelper app (which was much harder than your guide said, because launchd had it set to "keep alive" status. I found the launchd plist and deleted that, then I could kill it), I clicked the alias, and then Finder asked me for my password for the sparseimage. Voilá: my data!
Wow, so am I understanding correctly, you had an alias to a file (inside of the encrypted folder), outside of the encrypted folder? Then after stopping the helper (via a method that we don't expect most users to follow), you double-clicked on the alias file and were prompted to enter the password for the disk image? Am I correctly understanding up to this point?
If so, what happened next? I'm guessing that the disk image mounted, and the file opened? Did you see the encrypted volume on your Desktop, and if not, did you use something like
iVisible to make it visible? Were you able to get to your other files?