How come my USB dongle is not recognized by FlowJo?
Version 3: There is an extension that needs to be installed for the USB dongle to work. If you look on the CD that came with your USB dongle, you will find the extension as well as instructions in the Installation Instructions folder. Specifically, copy the MachaspusbDD extension into your extensions folder and then restart your computer. You can also download the USB dongle extension here. Version 4: You need to run the V4 USB installer. If you look on the CD that came with your new USB dongle, you will find the VISE installer as well as instructions in the Installation Instructions folder. Double click to launch the installer. You can also download the USB dongle installer here.