It seems that if no launch agents are installed by this app, running the Diagnostics script produces an error. Below is the contents of the text file produced by Diagnostics.
If I enable one or more drives in the app, then diagnostics works properly.
OS version:
10.10.5
Volume info:
Name: RAID
Path: /Volumes/RAID
Format: Mac OS Extended format
Current date:
2015-10-06 16:43:02 PDT
An error occured:
The command exited with a non-zero status.