When BulletProof Go!Zilla starts up I get an "Unable to create empty document" message.
One of BulletProof Go!Zilla's data files has become corrupted. This is often a side effect of some uninstall managers like CleanSweep. You will need to go into your BulletProof Go!Zilla program directory and delete the files filelist.gzl and monitor.dat. Upgrade to v3.1 or later and BulletProof Go!Zilla will automatically detect these kinds of problems and fix them for you.