Scratch

I need help! Scratch won't open. No matter how many times I try and run it, it doesn't open.

The last time I was on it, I clicked something unusual.

I opened the world menu, then I went to <Open -- Cvc project>

It turned the entire screen grey, but it didn't seem to lose any memory.

When I just clicked somewhere, it showed an extremely 2D dialog, and it looked just like the world menu.

I went to <open -- browser>

It opened the system browser, but boy oh boy! It was really UGLY!

I then closed scratch, and now it doesn't open. Please help!