You have to place the 2016 Katl bgl file in your ADDON/Scenery/Scenery directory. EFB looks at the default FS scenery files for RW, taxiway, approach etc so even if you display looks like new airport, EFB still sees old info from original scenery files. Most addon scenery does not edit the FS Scenery,cfg file which is used by EFB's dataprovider to create an index of airport info. The FS Scenery.cfg file usually has ADDON/SCENERY as its last entry (the 2nd /SCENERY dir is automatically entered by EFB)