The installer package didn't work out so well for a variety of reasons, so I'm going back to using a custom installer application. The installer should be a one-click process and will remove any old versions of Chax, including Chax 1.5 and the SIMBL-based betas and alphas of Chax 2.0. This version of Chax is entirely self-contained, as Chax 1.5 was, so SIMBL or PlugSuit is no longer required. Sorry to everyone that's been having all the random issues, this beta should clear up the problems that have been reported to me. The only change in this version is the installer; the functionality of Chax itself is identical.