I have this exact same problem but in Win 7 64 bit. (see title FDC1004QEVM: Missing driver for Windows 8.1 64 Bit). I installed following your document line by line. It installed fine. But when I connect, the device is displayed under "Other devices" as "MSP430 -USB example" with an yellow exclamation sign.
When I open gui, it always shown red dot "not connected".