Alright, I have the .jar file and it looks like this. 
It didn't come with a folder or anything so it didn't change into a directory.
Now, when I open it, it says this.
This has happened every time I have tried to open it.
I did what it said and went into to Console. This is what it had to say:

Now, this is very important because I will be an EPIC FAIL if I cannot open this file. So, thanks, I K T P Q.

It didn't come with a folder or anything so it didn't change into a directory.
Now, when I open it, it says this.

I did what it said and went into to Console. This is what it had to say:

Now, this is very important because I will be an EPIC FAIL if I cannot open this file. So, thanks, I K T P Q.