Thanks again for your help and patience. I took your advice and installed the packages via dpkg. Here is what I get now.
# adinfo -v
adinfo (CentrifyDC 5.3.1-398)
# ./adbindd -v
adbindd Version 1.1 (CentrifyDC-adbindproxy 5.3.0-504)
It doesn't appear that adbindd is any newer than what I had. I'm not sure if I'm just not finding the updated package or what. This was a fresh download as of this morning.