Yes, since it runs as it's own program (not a Minecraft plug-in), it will work no matter what version you have installed. The only thing that could break it is a change in the way Saves and Textures work, such as the change to textures with many image files in a recent snapshot, but it works fine after that change.
Yes, since it runs as it's own program (not a Minecraft plug-in), it will work no matter what version you have installed. The only thing that could break it is a change in the way Saves and Textures work, such as the change to textures with many image files in a recent snapshot, but it works fine after that change.
I've tested it with 1.4.7 and the 1.5 prerelease