Hi @BurrPeeman,
You need to load UE5EA BINARY from Epic Marketplace.
This contains Quixel Bridge Plugin. 2021.0.4 in its normal source code for Engine\Plugins\Bridge in the BINARY.
Delete the plugin source code in your GitHub UE50\Engine\Plugins\Bridge
Copy the directory Engine\Plugins\Bridge from the BINARY into the source directory UE50\Engine\Plugins\Bridge.
Start Visual Studio and use the UE5 solution Build the new code. Start without debugging.
Open plugins filter to “Bridge” plugin.
In the top right should display 2021.0.4 the old one is 0.3