http://www.iuasinc.com/firmware/
you can go this web . download Devention Dfuse USB Upgrade Tools Sep 24, 2014 (Devo radio upgrades, added Devo F12E)
then you flash this rom Devo F12E v1.5 (Pro Version) versus v1.6 (Smart-Condense Version for RTF Scout / H500)
this rom have H500 all defult setting ,,,, i hope can help you .....................