PARAGRAPH TEXT EDIT

 I have a corel file designed with corel x3. The page is divided into 3 columns. I  opened the file in corel x7. I tried to edit the Text frame in the middle but I could edit the text because the text tab is not enabled. Please how do I go about this in other to edit the text? Find the attached file. https://www.dropbox.com/sh/kuy9hebqij4c86z/AADU9Ykj9QWHlPRU_Ov0pi7Ja?dl=0