Thank you for the reply and the warm welcome. I Use Central to download the libraries, but I do not allow Central to manage my complicated custom scenery directory. Once downloaded, I manually moved the 4 directories to my custom scenery folder and ordered them at the top of my scenery_packs.ini file as:
SCENERY_PACK Custom Scenery/Orbx_A_US_Florida_Airports/
SCENERY_PACK Custom Scenery/Orbx_A_US_Florida_TE_Custom/
SCENERY_PACK Custom Scenery/Orbx_B_US_Florida_TE_Overlay/
SCENERY_PACK Custom Scenery/Orbx_C_US_Florida_TE_Orthos/