Help - Capture NX - No Browser

Hi guys. This is a little embarrassing but I seem to have lost the browser in NX. As you are all aware, you choose a target folder in File Directory and open up the Browser tab and all the pictures in the target folder should be seen as little thumbnails. I seem to have lost this ability. I can open up files through the normal File -> Open functions on the toolbar.

If it makes a difference, I use NX on a MacBook. Don't know if Apple's version is different. Thanks in advance for any help.

George