AARdata.dll is an add-on program that is activated by copying the file into the exportDLL sub-folder of Harpoon installation. To uninstall, just remove the file to another folder, change the .dll file type name or delete the file.
The DLL will produce at the close of a game or game session a txt file AARdata-(battleset file name)(scenario number).txt. (Scenario number for custom scenarios is '0').
Within the txt file the report is made up of titled sections providing:
Scenario information, 
Initial Start information,
Time information for each session of play 
Detailed game log messages in time order  
List of units destroyed for each side in summary and in detail 
List of damaged units at time of game close and
List of changes to game time compression.

New: 
Initial start shows player side