A working pchfdl.dat file has been uploaded to the Utility World web site. It is the one being used here.
If you haven't done so already, copy it to the "configs" subdirectory under the one containing the commercial version of PC-HFDL. Restart the program, and the squitters should once again show frequencies instead of numbers.
Don't worry if the file looks like gibberish in a text editor, because it's supposed to.
We thank the HFDL group on Yahoo! for this file.