Missing SD3 also :( I am using X3 Studio on win7 32 bit. I have checked the scan path and it looks fine. There was an article about windows dll redistribution file being the problem. There is a microsoft fix which i downloaded but no joy. i tried the reset option as per the link above. No good. I dont know what the Artist Instrumentation is so i haven't tried that.
When i go to insert my SD3 under insert > soft synths there is just no SD there at all.
Should i change to a different virtual drum system? Some of them are very expensive such as EZ Drummer (about 150) I'd rather try get my SD3 back if possible. Thanks all.