Everyone who said use 3.6.8 is right, after muiltiple trys installing again i reverted back to 3.6.8. If you need the URL just save the one on wordpress for 4.0 and change the version in the URL, then upload that folder to your WP Plugins folder.
You should still retain any settings you had before (at least i did). I only had 2 checkboxes added so didnt have much to lose but still, taking the whole fucking site down check your code before you release man!
