This is done periodically, usually when the season changes. The new System Table is number 31, or 1F in hexadecimal.
The pchfdl.dat file on this column's web site has been updated. Close down PC-HFDL, then find the directory it runs from. Change to the configuration subdirectory, find pcfhdl.dat, and rename it. Copy in the new file, then start the program. The numbers should change to frequencies again.
I have done this procedure on my own computer, and the file works. Thanks to the HFDL Yahoo! group for putting this up.
Meanwhile, here's what's being transmitted in New York's squitters at 2218 UTC. Obviously other times of day are different:
SAN FRANCISCO - CALIFORNIA UTC
8927 KHz 5508 KHz
MOLOKAI - HAWAII UTC
21937 KHz 13276 KHz 11312 KHz
REYKJAVICK - ICELAND UTC
8977 KHz 6712 KHz 5720 KHz
RIVERHEAD - NEW YORK UTC
11387 KHz 6661 KHz
AUCKLAND - NEW ZEALAND UTC
13351 KHz 6535 KHz
HAT YAI - THAILAND UTC
10066 KHz 5655 KHz
SHANNON - IRELAND UTC
8843 KHz 6532 KHz
JOHANNESBURG - SOUTH AFRICA UTC
8834 KHz 4681 KHz
BARROW - ALASKA UTC
11354 KHz 6646 KHz
KRASNOYARSK - RUSSIA UTC
6596 KHz 5622 KHz
AL MUHARRAQ - BAHRAIN UTC
8885 KHz 5544 KHz
AGANA - GUAM UTC
13312 KHz 11306 KHz
CANARIAS - SPAIN UTC
11348 KHz 6529 KHz