When I started with JavaFX in 2012 TimeboxFX was one of my first JavaFX apps. Recently in a meeting I wanted to use it as a gimmick and I found out that TimeboxFX needed some love... So here is the ...
Download the release zip(on the right sidebar, do not click code..download as zip). Extract directly to your Ashita directory(the folder with ashita-cli.exe in it!). Everything should fall into place.