I have been using these instruments files in Studio One 3 on MacBook Pro and all of a sudden they just went missing. I have used some of them in my songs, now I have to find alternative sounds. As per the pictures it shows that the sound sets are still on my hard drive. I am not sure whether to download them again. I tried installing them but that does seem to resolve the problem, or maybe it could be because I am fast running out of HD space. Please help.