I accidentally dragged the bar that has sprite, room ect. its long gone so I can't undo it. Is there any other way to bring that bar back? iv'e been working for hours so I'd hate to restart. Thanks.

please help

Im not exactly sure which bar you mean. Did you try finding it under "Windows"? Do you mean the resources window?

in the top bar where there is file - edit - build - window. click on "window" on the top bar. click resources. it should give back the sprite, room, etc.