This is an early development release. I am currently working a lot on JSesh, and I've just added undo/redo capabilities, plus a verification before exiting the program, but it has not been completely tested.
Note that the "Download" page will bring you to JSesh version 3.0, not to this one.
S. Thomas has just sent me the X, Y and Z family, so now,this new version of JSesh has a complete coverage of the Manuel de Codage (save a few signs which will be added later).
I deemed the event noteworthy enough to warrant an increase in the version number, so this is JSesh 3.0.
Version 2.13.7 replaces version 2.13.5. It fixes a small (but annoying, especially for people involved in the late period :)) bug in the rendering of the W1 sign.