Note you'll need to update to Windows 10 to test with Microsoft Edge, since it is not currently supported on any older versions of Windows (not even Windows 8.1). Windows 10 is already available for testing via the insider previews, but it's not long until the full release now. Windows 10 brings back the Start menu and can run Windows Store apps windowed on the desktop, supports the new Windows 10 Universal Apps which can also run on Windows 10 Mobile, and lets you test with the new modernised Edge browser, so it's a worthwhile update for Construct 2 users.
Note on some older insider previews Edge cannot access localhost, so the Construct 2 preview does not work. There is a workaround, but you might as well just update to the latest insider preview which fixes this.
As usual there's also a batch of bug fixes. Please test carefully and report any issues you find to the Bugs forum following all the guidelines. Please don't report bugs in the comments section here - they will not be investigated. Happy testing!