You can install both the Genesis Starter Essentials and the Genesis Starter Essential for Poser installers anywhere you choose as long as the folder has “write” permissions. They may be in the same location or different locations.
Keep in mind, you will need to add any new Runtimes to your Poser Library if they have not already been added. The content of both installers needs to be available to Poser.
Note: We recommend Windows 7+ users avoid installing them into a Program Files or Program Files (x86) location as Windows does not allow programs to “write” to these locations.