I no longer have access to the Mac machine I've been using to make builds of xCHM on. If they were important to you, I need to raise about 800 EUROs (for the cheapest MacMini machine available here, which I believe is the cheapest Mac machine available). If you'd like to help, please use the "Support this project" button at the bottom of any of the pages on the http://xchm.sourceforge.net website. All you need is a SourceForge.net account (which you can get for free), and a PayPal account. The minimum donation allowed by SourceForge is $5.

Of course, the source code for xCHM will continue to be free regardless, and anyone who prefers will still be able to make his/her own builds of the application.