Question about portable installation

I wonder if someone can help with a query I have on installing the Unreal Engine onto a portable hard drive.

From my understanding, you can do it if you install the launcher on the same drive as you want to install the engine. In my case, it means uninstalling the engine version(s) from my computer, uninstalling the launcher then downloading and installing them again. All good so far.

What my question is, I have games I’ve downloaded from the Epic Games store, also run through the launcher. Will I need to download and re-install all of these as well, or will they continue to run as normal?