Hello Ed,
I believe egllvtpxx.bgl is defect.
Whereas egllvtp.bgl is readable by all my tools (BGLanalyzer, SBuilder9) and contains some roads, 1 Lane, asphalt (1159) around the airport, (and nothing else), egllvtpxx.bgl is not readable besides with "TinyHexer". TinyHexer shows similar, but less data and "1162", which could mean "Road, concrete, 2 lanes".
I attach 2 pics with and without egllvtpxx.bgl, I could not find any difference.
I would suggest to deactivate egllvtpxx.bgl.
Regards
Guenther