How to work with Eucon McControl in N5.5 AND N5.1

Hello everybody.
I work with N5.5 and the Euphonix McControl and after installing the seperate Steinberg Adapter everything works fine.
But since there is an AAF-Import Issue with N5.5 and some Avid Versions, I sometimes have to switch to N5.1 which doesn’t have this Issue, to import the AAF and then re-import the tracks via xml into N5.5.
I was wondering why my Eucon option in the Device Setup of N5.1 is gone now. How can I get the McControl to work with both N5.1. AND N5.5 at the same time?

Thank you