Among many changes, use of vold decrypt for the HTC devices is one of the main changes. TWRP 3.1 now uses the system partition’s vold and vdc binaries and libraries to decrypt the data partition. Most changes are coding level, so if you enjoy using the TWRP 3.1 custom recovery then check out the full changelog. Below are the major changelog and new features of TWRP 3.1 TWRP 3.1 custom recovery download is now available for all supported devices. Go here to download TWRP 3.1. You can install the update either via the TWRP recovery installed on your device (requires TWRP 2.8.4 or higher installed) or via ADB. TWRP custom recovery is one of the most popular options for flashing custom ROMs and Zip files. If you are still using other custom recoveries, then it is highly recommended that you make the switch now and see what this little beauty can do for you (Source)
