Hi @BurrPeeman,
This is the standard Epic built binary from Epic Launcher.
Unreal Engine 5 Early Access & Product Details - Unreal Engine
Scroll to the bottom of the page.
The left-hand panel at the bottom “Try UE5 Early Access today”
Click on the Open to take you to the Epic Launcher.
Click “Download now” needs about 37GB which can be saved on D: drive
Then look in D:\Program Files\Epic Games\UE_5.0EA\Engine\Plugin\Bridge for the new version.
The zipped source code is very old and does NOT contain the Quixel Bridge updates.