In your multi browser, where it says directory what is it set to ? I think the default is "all spectrasonics". You can change the parameter from the dropdown menu to all, or user, or whatever else you have. Either that or try a search "by author".
AFAIK there is no way to automatically change a SIT to multi-out, so you either have to reload the multi in a new instance and redirect the midi tracks , or manually set up new audio out tracks and manually assign them to the various synth outputs.