For the record here couple of things to try.
- Check the PID out for the states it gets into, the FX30 should normally be 68C0, if it is something else then something is wrong.
- The unit only enumerates a single com port when there is a probem with the firmware and it falls back to the Qualcomm boot loader.
- To try and create a one click updater for windows which is not on the source take the WP8 one click updater, open it with pkzip/izarc and replace the WP8 CWE file with the CWE file for the FX30 and you should be able to update the unit from windows now. Note this is obviously a hack but the tools are all the same.
Regards
Matt