Error Retrieving Rights with Access Checker

Oct 2, 2014 at 12:59 AM
I've just downloaded Access Checker and tried using it, but after selecting Entity Name (User-systemuser), Object ID and User, when i hit Retrieve rights I get an error message stating "The 'RetrievePrincipleAccess' method does not support entities of type 'systemuser'."
I get the same message after trying different entities, just the 'does not support' excuse changes.
This is a fresh download of Toolbox so it's version 1.2014.9.17.
Appreciate any advice.