Version Switcher is a tool that allows you to change your Warcraft III version, for example to watch old replays or to play on platforms that don't use the latest patch.

This is a super compact (<7 MB), open source (written in C#) Version Switcher, which allows you to switch to any of the following Warcraft III versions: 1.20e, 1.21a, 1.22a, 1.23a, 1.24a, 1.24b, 1.24c, 1.24d, 1.24e, 1.25a, 1.25b, 1.26a.

Download: Warcraft III Version Switcher v2.1