Change to another file

I have 4 separate RootsMagic files. In RootsMagic 7 all 4 were there any time I opened the program. I don’t see how to open the other files. There are some people who are common to all 4 programs, so I need to be able to go from on file to another without closing one.

I figured it out. Sorry to bother people

Working with multiple databases: