Downloads
The current release of the Randomizer is 1.7.2, released 23-07-2016.
Download for Windows (EXE version)
Download for all other platforms (executable JAR)
Since there's no longer a download page with a changelog for each version, you can see the list of changes per version by clicking here.
Click here for a full listing of old versions.
If you're interested in the source code, you can browse that by clicking here.