Change window detection back to window.innerWidth

I'm using Responsive Menus along with an Omega 3.1 subtheme. According to the Omega documentation these are the breakpoints in my theme:

0px to 740px wide - global.css
741px to 979px wide - global.css + default.css + narrow.css
980px to 1219px wide - global.css + default.css + narrow.css + normal.css
1220px and wider - global.css + default.css + narrow.css + normal.css + wide.css

I set the Responsive Menu breakpoint at 740/741px. Unfortunately, it doesn't break in sync with Omega (= CSS media queries), but at a much greater width.

This issue was reported previously, now marked "fixed" and "closed": #2145933: Screen width to respond to is not working properly → Please let me know if there's a way to use this module so it works nicely with Omega. Thanks.