Ohki is right as usual. If you didn't know, you can place your runtimes anywhere you wish then add them to your library. I have three runtimes. One that came with Poser. It has only a few items in it. One runtime for everything from Daz and another runtime for everything bought here and everywhere else. They are Terabytes in size and are located in on external hard drives. That way, no matter how many times you have to install Poser (or DAZ for that matter) your runtimes will always be in the same place and untouched by your installation.