I had to uninstall indesign CS5 because it wouldn't open on my computer. I just got a new MAC and when I transferred it over it stopped working. In the meantime I installed a trial of the new Indesign CC and now I can't figure out how to just put the CS5 version back on there. I have the serial number... do I need to uninstall my trial. What do I use to reinstall it with my serial number?