Turning fullscreen on made Minecraft crash, and now it crashes on start every time

I switched to full screen on minecraft, the screen turned black as if it were loading it took a while so i closed minecraft and reopened it. When I logged on it gave me a program on my taskbar saying "minecraft minecraft" then when i closed the program it gave me this error message:

java(tm) platform SE binary has stopped working. 

Is there a way to fix this?

Try turning off full-screen manually:

1. Open the start menu in Windows and, in the search bar, enter 'Minecraft'. Look for the '.minecraft' directory in the search results.
2. Find the 'options' file; it should have items on each line, such as Clouds:False and graphics: fancy.
3. Find the line labeled fullscreen. If the value to the right of the colon says true, replace it with false. Save and close the file.
4. Try running Minecraft again.

I hope this helps!