Hello Mullanphy,
I'll try to answer each of your questions. Here goes:
What file format are the Chord Dictionaries?
Both files are executable files. The file for the Guitar Chord Dictionary is "GuitarChordDictionary.exe" and the file for the Piano Chord Dictionary is "ChordDictionary.exe".
Are the dictionaries stand alone programs or BiaB add-ons?
Each is a standalone program.
Can sample pages be viewed anywhere and, if so, where?
See the screen shots below.
Do the chord charts/pages include fingering chart for each chord?
Yes for both programs.
Is there a video tutorial about how to use the dictionaries with and without BiaB?
Not that I'm aware of however both programs have Help buttons that open a help file.
+++ HERE +++ is a link to a webpage that provides more details of the Guitar Chord Dictionary while
+++ HERE +++ is a link to a webpage with more details about the Piano Chord Dictionary.