Jane, go here to my resources post #156 and toward the bottom of the page you’ll see a link to @bo3bber’s decrypter. Just make a copy of the zeosleep.dat file first to be safe.
When you get ready to install the decode viewer, @woodinblack has repaired and corrected the zeodecoderviewer 0.3a. His version is zeodecoder W0.4a which can be used in place of the original 0.2a and can be downloaded from his link in post #315.
You might also want to look back a few posts at post #313 by @woodinblack for a preview of a new viewer he is working on.