QFX files are "Quicken OFX" files
QFX files are not OFX files. When you install Quicken on your computer, you will see QFX files described as "Quicken OFX" files. This is a great misunderstanding, as Quicken does not import OFX files at all, and imports QFX files only (also, Quicken has to be at not older than three years to import QFX files, and Quicken imports QIF files). Video below explains the confusion about QFX and OFX files.