Hi @Edgar_Choueiri ---- Thank you for the report and the questions, we always appreciate the feedback.
In regard to, using an older version of the application, this is not something we encourage as all of your Roon devices should be running the same versions/builds to function as expected.
With the release of 1.3, Roon now supports multichannel playback and our knowledge base contains good documentation on how to configure/use multichannel cable device with the software.
Can your provide me with the details of your current setup as seen here and we can try to get this sorted out for you 
-Eric