So, if anyone else has this problem. which apparently HP can't solve, I found a workaround for text files. Printer works fine printing PDFs through HPSmart which will only print PDF files. So, I've been turning my text files into PDFs via Microsoft's "Print to PDF" and then printing through HPSmart. PDF files will not print directly. Not a great solution but good for emergencies or until I switch all my printers to another manufacturer.