In case anyone is interested in txt 1.09 reference data...
I was able to use the convertdata utility and some Windows command line judo to convert the majority of the entity files in 1.09 to text format. The Ability entity files must have a different format because the conversion didn't work on any of them, but I appear to have a successful binary to text conversion on the rest of the entity files. I played one short game without difficulty using the conversions.
If anyone's interested, I can post some command line information on how I did the conversion.