Error: Script is not found in project

I have spent days building the terrain for a game in playmaker. I moved files that were in the asset folder into a subfolder for all the scenes. I know not to move the asset folder but didn't realize if anything inside the asset folder is disturbed, it would cause the game to not open properly.

I hope all is not lost! I spent so many hours and was just about finished when this happened.

If this is the error: "Editorwindow could not be loaded because the script is not found in the project" is there any way for me to place the script into the assets? Where would I find the script?