Since the launch of UE4, we have been working as quickly as possible to resolve important issues as they have been reported to us. Once an important fix has been made, we sometimes respond directly to the affected users by providing a QFE (“Quick Fix Engineering”) which we share here on the forums and Answerhub.
These QFEs eventually get rolled into the hotfixes and major version release updates that we provide for all, but until those updates we want to make sure that they are available to the select users who need them.
Please be aware that QFEs should only be used by the individuals who are experiencing the select issue; they do not provide any additional features or improvements for other users.
QFEs are for the binary editor from the Epic Games Launcher. Github users can update from the Release branch to get the current fixes.
AVAILABLE QFEs in latest Engine version
QFEs for Previous Releases
If you experience any issue with a QFE you have applied, please reach out to us on the AnswerHub, in the Installation & Setup section. Thanks!
This thread has been updated with a QFE for 4.14.1 to resolve frequent crashes with the error message Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0006 - ‘HUNG’) as reported in UE-37999 & UE-38818.