I bought Director Suite 4, and later used it to purchase an upgrade to PowerDirector 15 without buying Director Suite 5. Using the upgrade purchase option requires PD14 to be installed in order for PD15 to install. Some people say PD14 and PD15 can be installed on the one computer at the same time. In my case, I ended up with a PD14 start menu item that opens PD15. And the programs list didn't show PD14 - only PD15. Since PD15 has been full of problems - including transparent PNGs with their non-transparent edges being cut off in PiP designer, normal PowerDirector titling having the same thing happening to it, transitions that cut out all audio (even separate audio in other tracks), and a playhead that doesn't move, I decided to uninstall and reinstall PD15. But after doing so, PD14 is no longer on my computer. So now, since my PD15 upgrade can't be installed without PD14 present - and since there's no separate PD14 installation file in Director Suite 4, I now have to use the whole 1.8GB Director Suite 4 installation file just to be able to upgrade one of its components. So far today, these problems have wasted 5 hours.