@OS4User, strange that that change was needed, perhaps the file change broke a md5sum or such.
I should see if I can update the intree version of Chatzilla, which is where I got the version I uploaded.
If using 0.9.93, the file is in chatzilla.jar, it can be unzipped, the file replaced and rezipped.
I also found my problem with not being able to update chatzilla, the chrome directory was locked and I had to reboot to completely delete the old add-on and then reinstall.