Just had a small error; had 1.20 installed and, after a while, it stopped displaying any monster data from the database, though the file was intact. Several re-installs failed to fix the error, then I installed 1.24 after remembering it had been updated. Now it shows monster data for a couple dozen monsters, but not all of them (and I reconfirmed that the Dire Bear, at least, is still in the database file). Have you encountered anything like this?