Help with Close All Advanced Script!

Hi, I found the following script from the internet - supposed to help close mutitple trades of the same selected pair.

I can't seem to make it work. I think this is because the file is in mq4 format instead of ex4.

I'm really a noob in metaeditor - was really hoping someone could really help to convert this to ex4?

Thanks very much

use the build 509 editor ( http://www.forexfactory.com/showthread.php?t=470340 ), load the file, press F5 to convert it to .ex4, copy the generated .ex4-file to the proper mt4-directory ...

Try this, remember to remove the old MQ4 file from the folder
I have only modified and compiled, not tested

thanks so much guys!