Q: How do I re-open and get back into my iPhoto if this message appears: "Your photo library is either in use by another application or has become unreadable"? What do I do?

Q: How do I re-open and get back into my iPhoto if this message appears: "Your photo library is either in use by another application ... How do I re-open and get back into my iPhoto if this message appears: "Your photo library is either in use by another application or has become unreadable"? What do I do? more