Right hand menu/window disappeared, including buttons at top.

The whole right hand side disappeared, including the buttons, so now I can't fxp. I have local on the left hand side, and the buttons on top of the left hand side operate the right hand window. How can this be fixed?

Perhaps you have FlashFXP in single connection layout mode?

From the main menu > View > Single Connection Layout, click it to toggle it.

If this doesn't solve the problem please provide a screen shot.