Project Panel Opening in Separate Window

[SDCone]

Silly, potentially very stupid question here, but ever since I've updated to the latest version, whenever I start a new project the Project Panel opens in a separate window as opposed to a tab in the bottom left corner (along with Media Browser, Info, Effects, History, etc.). I'm using the same Editing workspace I've always used. It's driving me a little nuts, but for the life of me I can't figure out how to make the Project Panel a tab again. Help?

Thanks in advance,

Stephen 

[Ann Bens]

Reset your workspace, see if that will help.