ok - weather wasn't too good in Belgium tonight, so :
UnO4Kemper firmware v.1.4 has been released and is being shipped from this moment on. With a few clicks you can configure each of the 2 expression pedals to be used for Volume, Wah, Pitch or Morphing. See chapter 3.2 of the manual at http://www.uno4kemper.com/UnOforKemper_manual.pdf