How to access EXR layers?

This feature is now built into AE. The standard way to get to it is through the Import File dialog. You choose your EXR and then say you want to Import As: Composition.

But you can also bring back Create ProEXR Layer Comps in the File menu item by running this script to change your preferences (also attached):

if(app.preferences.havePref("OpenEXR", "File Menu Item") && app.preferences.getPrefAsLong("OpenEXR", "File Menu Item"))
{
	alert("Create ProEXR Layer Comps should already be in the File menu. Maybe restart AE?");
}
else
{
	app.preferences.savePrefAsLong("OpenEXR", "File Menu Item", 1);

	alert("Restart AE and Create ProEXR Layer Comps should be in the File menu.");
}