Try the latest nightly. https://mega.nz/#F!s8RDXbiJ!cxwQ4EvdIgoDI1OrwiAKFA f5de433
Delete rxTools directory before installing.
Copy rxTools directory to SD card.
And put firmware.bin in /rxTools/sys
URL is http://dukesrg.github.io?rxTools/sys/code.bin
You have to change rxinstaller.nds if you are going to use that.
this url is to boot from the browser? because here did not work