I use the GnuCash free software accounting software. Like many accounting tools, it can import bank or credit card transactions, and has a way to learn the correct mapping from transaction data to my own account structure. And, sometimes the tool gets the mapping wrong, and needs to be reset.  Here is how I was able to perform this reset. I post it here in the hopes it will help others. Fasten your seatbelt, it involves some awfully technical command-line tools, including XSLT processing. Continue Reading »