Hi,
Here a zip containing the latest binaries, if that can help. This corresponds to binaries from CL 44768717 (https://github.com/EpicGames/UnrealEngine/commit/1d6409bc88da93e0ac4c2320cf54dd7628b2dd37\). If you prefer, sync the main line from GitHub, run Setup.bat to get the binaries and copy them over your 5.6.1 UBA binaries. The 5.6.1 release is out and there is currently no plans to release a 5.6.2 version. Normally, I would not expect UBA binaries to be updated again on 5.6.
Regards,
Patrick