I had the same problem as XD1. The GenUploadStats macro in GSAK worked great until I changed my geocaching username. Then the macro kept trying to upload my stats under my previous username, and I just got errors. There seemed to be no user-friendly way to change my username for the macro. That is, until I found an apparent solution. I had saved all my GSAK files under "../Application Data\gsak\Macros." In this folder, I moved (or deleting may be just fine) the file named GenUploadStats.dat to another folder. Then I ran the GenUploadStats macro again. This time, the window that asked for my geocaching ID info immediately popped up. I filled out my new info and the upload worked great! So far, this method seems to work just fine. I hope this helps!
