TaxCPANY

I installed only the tax-prep program, yesterday.  Today the install program offers only to un-install that -- i.e., I cannot find a distinct resource for downloading/installing the payroll module.  So I went that route but that didn't clear the way for the payroll module to show up.  Couldn't find anything in atxsupport about this.  Is there a 'where' to find/initiate the payroll installation?