How to switch from RxTools 2.6 to 3.0?

Hi,

I wanted to switch from RxTools 2.6 to RxTools 3.0 but I've an error when I try to boot via MSET (an error has occurred...)

I deleted RxTools.dat, firmware.bin from my SD and I replaced old 2.6 RxTools folder by the new (it has firmware.bin in /sys)...

What should I do?

Thanks