My question concerns the USB-6501 device. Our USB-6501 with firmware supporting NI DAQmx Base version 2.2 (or earlier) was plugged into a Windows machine with NI-DAQmx 17 and NI-DAQmx automatically updated the firmware to be compatible with the installed version of NI-DAQmx. But, we need to update the firmware to be compatible with the old NI-DAQmx Base because our application uses it. So we need a Windows machine that has NI-DAQmx 7.5 (or later) and NI-DAQmx Base 2.2 (or earlier) installed. Please help us download the NI-DAQmx Base 2.2 driver.