SWS RV14 and GTNxi 750

[N815MK]

I'm trying to figure out what I'm doing wrong.  Can't seem to get the TDS GTN750 to display in the VC of the RV14. The website says "Requires the selection of the TDS GTNXi during the installation of the aircraft (from within the installer)". I purchased the RV14 in the MSFS store and didn't see any options.  I downloaded the free extras avionics mod.  I tried a couple folders in the community folder, still no luck.  Not sure what to do.  Thanks.