facebook WSJT-X (+Devel) / JT65, JT9, JT4 group I became aware of the development of WSJT-X behind the scene so to say and not only by K1JT and his team. Those development versions are downloadable and you can execute them at your own risk of course. Joe K1JT does not recommend it at all because you don't know what problems it can give. But just for curiosity...Many radioamateurs are testing these so called unofficial development versions and from what I read there are some interesting improvements. So, if you really are into experimenting I guess you take your chance and experiment as a radioamateur does not only experiment with radios but also with computers these days. Just to be clear that K1JT is also developing WSJT-X and calls his versions "alpha" releases, those are also experimental. However Joe recommends always to use the official release that can be downloaded from the WSJT download page.