I reinstalled Snow Leopard, now can not launch quicken 2007.

Ran ONYX cleaning and maintenance to see if it would speed things up for me. It recommended booting from install disc - so I booted with "C" and the Snow Leopard install disc. It reloaded Snow Leopard, which cleared the errors found in ONYX task. I ran Maintenance and cleanup tasks, but now when I engage QUICKEN 2007 it starts to launch but then closes/crashes. Any idea what I can do? QUICKEN 2007 came with the Mac, so I can't reload QUICKEN.