Have you encountered that annoying WLM bug where despite clicking its "Work Online" button, the only way to get it back online is to use the equivalent option in IE? If you have then I see what you mean - the "Work online/offline" option has been removed from IE11.
If you can't find a fix of your own then a workaround that should work would be to go back to your previous version of IE by uninstalling IE11 via Control Panel -> Programs & Features -> View Installed Updates. Because it's a long list you can use the search box top-right to locate Internet Explorer 11 quickly. You can always go back to IE11 when the job's done.