Please reread your post and think of how we, other users, could reply. This is on par with the user who told us that he lost his monitor and asked us where it was and how to get it back. Where were your synthesizer instruments when you last saw them? Did you contact the police? Check on the floor. Etc.
Reformulate your question with sufficient information describing your problem so that we can understand what you are talking about and maybe someone will help. Provide the version (Premium?) and year of MMM that you are using. What operating system do you use. Did you change anything significant on your computer recently? For example, upgrading to Windows, or reformatting your hard disk. Which synthesizers did you have?
Sorry for the nasty, but please don't ask us to try to guess at all of this.