The default directory for screen saver is Windows system directory , and screen saver can be easily listed in screen saver settings window. So screen saver installer created by Power Screen saver Builder is also install to this directory . But you can changed the default installation directory.
Just turn to Advanced Output->Other , and dis-select the "Always install to Windows system directory." option.
Please see following :
Please note that , after your screen saver is installed to other directory , maybe Windows could not list it's own screen savers , If you want them back, just uninstall your screen saver or install a screen saver in System32/64 directory.