Graphics Bug - Door Stuck

[Tiger]

I have a couple suggestions that could prevent you from having to start all the way over. Maybe you could try building a different door frame around your door that is big enough to fit the whole door?? Either that or maybe you could have the acid melt the whole door down all together that way you don't have to worry about opening it afterwards? And lastly try hitting the magnet button in the bottom left of the level editor and moving your door a little to the left of the door frame. The magnet button enables you to move entities just a hair instead of whatever you have your grid set to. Hope this helps!

This is the technical support, not custom story development support.

On-Topic: Like Jens said, just load an old save.
Or you could go into the map with the level editor and remove the door(You might want to create a backup so if you ever replay the story you can play it normally)