FitNesse for Appian -- Encrypted Password File

Has anyone been able to run FitNesse for Appian with a Password File?

http://fitnesse.org/FitNesse.UserGuide.AdministeringFitNesse.PasswordFile

Here's what I'm seeing.  All runs use the following command

java -jar fitnesse.jar -a "passwords.txt"

where the passwords in each file are cleartext or encrypted

When it's run, the authenticator says MultiUserAthenticator (password.txt) versus PromiscuousAthenticator (users.properties).  But, the above tests seem to indicate that passwords.txt is being ignored completely and FitNesse is only using users.properties.

I hope someone can shed some light on this for me.  Thanks