.lock file

Dear Sir:
Storyboard 4.1 on my iMac osx10.8.5 suddenly stopped showing its whole workspace windows.just the upper menubar shows itself.Ive tried restart computer,reinstall software but nothing works ,and theres this project.lock file that appears inside project folder while application is open and disappear when closed.i really hope you can help and theres a solution for this problem.waiting for your advise.
thanks

Two entirely different issues here… The .lock file of a project is created when you open a project and should be removed when you close it again - that is… unless you force-quit the program. It is also possible to have a .lock file if you for some reason copy a project while it is opened for editing ( I suggest avoiding to do this).

To have your workspace restored go into the menu-Windows-Restore Default Workspace.