where can i locate the mql editor for download?

[JJASPER7]

i recently had to download a new mt4, and i cannot find the editor or compiler.  i thought it all used to come in as a package.  has that changed?  anyhow, from where can i find and download the editor and compiler(web address)?

[Keith Watford]

What happens when you open the platform and click on the icon to open the editor or press F4?