i recently had 5.0 installed on the TIU by the LHS.
Find a different hobby shop to upgrade to DCS 6.1, which has been available;le since early this year.
Also, ensure that the WIU hasfirmware 1.1 installed. The current version of the DCS App requires that the TIU has DCS 6.1 and that the WIU has firmware 1.1.