The full image suite. (Equivalent to v1.1+hotfifx).
If you already have v1.1 and the hotfix, you don't need this.
First time installation: execute XmhShellExtensionsInstaller.exe as in instructions.
If upgrading from v1.1: Just overwrite existing files.

This will fix the problem with DDS output color space format in v1.1, as described in the Sticky post.
To install, extract and overwrite existing files. And done. There is no need to run XmhExtensionsIntaller.exe for this fix.
(v1.2 already includes it)