Here's the changelog for Windows Device Recovery Tool v 3.11.34101:
- Support for Lenovo Softbank 503LV and Zebra TC700J mobile devices.
- Add new device for HP Elite x3 Telstra and Alcatel IDOL 4S devices.
- Update the MCJ logo.
- Added accessibility support for Narrator.
- Other minor enhancements and bug fixes.
If you haven't already got WDRT installed then you can grab the tool here. It has saved my bacon a number of times, restoring a smartphone back to true factory condition. Though do note that if you restore an older W10M-upgraded phone back to Windows Phone 8.1 and the phone isn't on the approved list for the upgrade then you're essentially stuck on WP 8.1. So that's a one way street.