I have tested the code on a Explorer Rev.6C and the code works ok.
You may want to disconnect the explorer completely from power after re-programming it.
This is to reset the RN module, in the later version Rev.5+ we made this possible in hardware.
Alternative way is to upload the passthrough example.
With this sketch you can send all the RN command manually.
sys get hweui is the command to get the hardware eui from the module.
All command can be found here: