My DBVisualizer keeps opening in new window

Hi Team, Suddenly my dbvisualizer is behaving differently. whenever i am opening a new sql window instead of same workspace it is opening in a new window and i have to double click to make it to a single window. Attached is the screenshot..i have uninstalled the s/w and reinstalled it and it gives the same

Please help.

I want the tabs to be in the same page and should looks like this attached file