Can't find my source data

I have been using this program for the past few months with no problem.. and all of a sudden.. I can not see my source data on the right side of the screen.. I can still see that I have an active connection with my lab on the left and the transfer que on the bottom but I don't see how to pull up my files on the right.. There is no source data.. How to I get my files back on the screen along with the preview screen ???

Menu: File->New Local Browser