PADS 9.3 is a completely separate installation from previous PADS releases and uses new installation methods to create an easier installation experience. Database and ASCII formats for Layout and Router designs have changed. The PADS library format has not changed. PADS Logic ASCII and database format are the same as PADS 9.x. The Installation path for PADS 9.3 is still C:MentorGraphics, but installs using a new folder to prevent overwriting an existing software installation. While PADS 9.3 installs the unique C:MentorGraphics9.3PADS folder and does not overwrite previous PADS installations, you should back up your existing PADS installation, designs and libraries prior to installing PADS 9.3.