One zip file containing all versions. Should perform better than 0.3.
Version 0.4 is not very different than 0.3, but due to some tweaks to the parallax mapping function and the switch to much less expensive matrix operations, it should be more optimized.
This zip file contains all variants of the mod, so just pick the matching pair of folders and .mod files you want, or just extract all the contents to your mod folder and select the one you want from the launcher.