Houdini Engine needs to be download and MANUALLY moved to UE5 Plugin Folder

https://www.sidefx.com/docs/houdini/unreal/install_houdiniengine.html

1. Download the Houdini Installer in the SideFX
2. Engine Plug-Ins > Unreal engine Plug-In
3. Go to the directory where the plug-in was downloaded
4. Copy the HoudiniEngine folder to: \Epic Games\UE5.X\Engine\Plugins\Runtime\HoudiniEngine