Portable version is a single executable, can be run from USB drive and doesn't write to registry.
You can download the sources.
Supported OS: Windows 10, Windows 8, Windows 7, Vista. For XP use version 3.1.2 .
What's new in this version?
Read version history .
If you're adventurous, you can try pre-release builds.
If you really need them, you can download them from here .