Is there a way, or can you create a way, to view this data externally? I would assume that the data is stored as a json or xml, though encoded differently so that I can't simply open with notepad++. Or perhaps its a database file. I am unsure.

Can you tell us how this file is encoded so that we can open it?

Does it store all the transaction history since beginning to end of a player or does it delete old lines like the panel in game that shows us this data?

I was attempting to restart my server, but I wanted to nullify every negative transaction made on the server and give everyone back every spent Arc. I also wanted to be able to view and edit this data outside the game or at least decode it to use in a webpage if I wanted to.