Here are my investigations so far, I'm not certain if any of this will be helpful at all

/Applications/Accordance.app/Contents/Resources/Gloss folder does not contain anything related to diagram
However in the main app support folder it does exist.
/Library/Application Support/Accordance/Gloss folder/GNT-T.diagram
If I examine this document:
/Users/waynestewart/Library/Preferences/com.OakTree.Accordance.Mod.txt
I discover this:
GNT-NA,2.0_-1112641527,:Modules:Texts:
GNT-T,3.9_-922986458,:Modules:Texts:
GNT-TIS,1.7_-922980589,:Modules:Texts:
GNT-TR,3.7_-922980312,:Modules:Texts:
GNT-TRS,1.3_-954477133,:Modules:Texts:
GNT-WH,1.6_-954930169,:Modules:Texts:
If I look in here:
/Users/waynestewart/Library/Preferences/Accordance Preferences/Module Installation Log
I find the following entries for today:
Version 10.1 11/27/2012 11:28 AM
The file “Deissmann-Studies” could not be found at
BAD path name
The module “GNT-T.diagram” has been Installed.
The module “TDNT Complete” has been Installed.
The module “TDNT Complete” has been Installed.
The file “Deissmann-Studies” could not be found at
BAD path name
Version 10.1 11/27/2012 11:54 AM
The file “Deissmann-Studies” could not be found at
BAD path name
The file “Deissmann-Studies” could not be found at
BAD path name
The file “Deissmann-Studies” could not be found at
BAD path name
Version 10.1 11/27/2012 1:38 PM
The file “Deissmann-Studies” could not be found at
BAD path name
The file “GNT-T.diagram” could not be found at
BAD path name