New Message defaults to “File” rather than the useful “Message” tab… I can’t change it back! Help!

Hey!

New messages always defaulted to the Message Tab with all the useful stuff (font, attachment, formatting, etc...) but all of a sudden goes to the FIle tab.  And if I hit the massage tab and use something (say, change the font color), it does what it should but automatically goes back to the File tab!

I want it to always stay at the File Tab (I'm 99% sure it always did up to a few weeks ago!) and i can't find any setting to change)!  Please help if ya can.

Thank You!!!