Which file to delete/clear for fresh YOU config

I would like to know what file needs to be cleared or deleted (which ever is more appropriate) in order to have YOU re-update the installed packages. I recently tried to install a newer version of RPM and had to reinstall default rpm program from the 7.3 disc. YOU and Yast1/2 would fail due rpm-4.x and now seems to be running properly. However, I would like to reinstall some packages using YOU, unfortunately I had previously installed all the patches and therefore YOU won't show any further patchs (at least until new ones are released). So, how do I reset YOU to give me the option to re-install the patches/updates. TIA, Curtis