You can download WiX v3.5 build 3.5.1419.0 or higher and start using it with the VS 2010 release candidate.
There are a couple of notes to keep in mind as well:
- Now that WiX v3.5 supports the VS 2010 RC starting in build 3.5.1419, these builds will no longer support older beta versions of VS 2010. If you switch to this build of WiX v3.5 or higher, make sure that you also switch to the VS 2010 RC if you haven’t yet or you will not be able to use the Votive VS add-in.
- Only VS 2010 has declared a release candidate. WiX v3.5 is still in beta. If you encounter any bugs with these new features or have suggestions for improvements, please report them on the WiX bug reporting site or the WiX feature request site. If you have any questions about using these new features or about WiX in general, I encourage you to use the WiX mailing lists.