software update 4.0 in Jester Range Posted August 22, 2018 · Report reply On 4/11/2014 at 4:27 PM, kewl said: 2) The desks are unable to unzip .zip files or navigate sub-directories, so first extract the contents of the .zip file to the root directory of a USB memory stick. This will be a file with the extension .jos, plus a .joh file for JesterML & JesterTL Range desks. It is recommended that only one .jos file should be on the USB memory stick at any one time. If you experience problems using the built-in zip functions of Microsoft Windows, then try Winzip (www.winzip.com). Winzip creates archives only in zip format. 7zip creates archives in zip, 7zip (7z), bzip2 (bz2), and a few other formats. 7zip format generally compresses better than Winzip in their native formats, but is not as fast. Both are based on LZ77, which compresses by replacing string matches with pointers to earlier occurrences. The zip format uses deflate, which encodes matches using Huffman codes. 7zip uses LZMA, which uses context models and arithmetic coding to encode matches and literals. Context modeling is slower but compresses better. Moreover, 7zip supporting much more compression formats.