Hi Ken:
Based on the info presented above by Dick and me, you should now have resources available to use for your KBHM project.
Dick's ZIP file cited / attached above within this same thread:
https://www.fsdeveloper.com/forum/attachments/kbhm-correction-zip.82609/
...is AFAIK more likely to be useful in MSFS' SDK DevMode GUI, as the sim will still be able to display the underlying MSFS default KBHM AFD elements when you load his MSFS SDK 'project' XML into DevMode GUI.
IMHO, the ADE
*.apf file in Dick's ZIP when opened in ADE, is likely to require that you create the entire airport from scratch, or perhaps make non-AFD infrastructure object changes such as excludes etc., since Dick's ADE project file in that ZIP does not allow the underlying MSFS default KBHM AFD elements to display in the ADE workspace.
If at some point you wish to allow the underlying MSFS default KBHM AFD elements to display in the ADE workspace, you can do so via either of 2 methods.
1.) ADE Menu > File >
Create Project from MSFS BGL File > (fill in requested info using MSFS' required naming syntax) > [Go]
(...browse to):
[MSFS-2020_Packages install path]\Official\OneStore\fs-base-genericairports\scenery\0302\
APX24200.bgl
...
or:
2.) Un-ZIP my ZIP file linked above into a folder chain, in ADE 2020 Alpha 21 HF5:
https://www.fsdeveloper.com/forum/attachments/kbhm-1970-km_backup-zip.82612/
You can then open a (entire) KBHM project via:
ADE Menu > File > Open Project > Browse / select / [ Open]:
[ADE2020_Alpha_21 install path]\F20\KBHM-1970-KM\
KBHM-1970-KM.apf
Good luck with the learning process.
GaryGB