Check the Docu of Orbx in relation to the Config in there tools for the „Insert point“ and follow the docu to define this point to the lowest Airport/local related Addon you have, minimum below Munich.
It is not in Issue of the Munich Addon, but the Orbx Addons are not self configured and need the attention of the Users related to there docu.
For help in this case, contact Orbx to explain it to you.
I installed EDDM and I love it, however I have ORBX installed and the taxiway textures do not appear. I deleted the ORBX EDDM files and then ran the AEC from ORBX and it still doesn't work. Is there something I'm missing?