It's a know bug since 2.0.0, already mentioned here:
http://www.futeko.com/newforum/index.php?topic=1495.msg12041
In short: there is no option to set external keyboard layout in the new fw.
I think this hasn't been reported as a bug to HiMedia then.
However, you can use this workaround:
I installed the following app and I was able to set up Hungarian layout:
https://play.google.com/store/apps/details?id=com.apedroid.hwkeyboardhelperdemo&hl=hu
It's a demo, but it works for now and does not popup any demo related messages so far.