Note that I have corrected a problem which occurs when you enter incorrect ciphertext and hit "Play", then correct the text and hit "Play" again. Version 2.00 appended the corrected text to the existing text in the lower part of the window. Version 2.01 removes the old text before showing the corrected text. If you are using the app, you should download the zip archive from the same place
As before, just unzip the archive to anywhere and point a browser to index.html in the Cryptogram folder.