My system is not detecting previously installed versions of the engine after performing a fresh install of my OS.
To solve this issue:
- Move the engine installations back into the expected location. Default install locations on Windows are listed below, but the correct location might be different for you if you changed the location of the launcher install.
- For 64-bit: C:\Program Files\Epic Games\<EngineVersionNumberHere>
- For 32-bit: C:\Program Files (x86)\Epic Games\<EngineVersionNumberHere>
- After you've placed the folders in the right place, open the Unreal Engine tab of the Epic Games launcher.
- Select Library in the panel on the left.
- Click the Add Versions button next to Engine Versions to get a new entry in your list of engine versions.
- In the version number drop-down of the engine version entry that just appeared, select the engine version you moved previously and click the download button.
- Assuming there haven't been any updates to the copy you have, the launcher will just run through the 'Verifying' stage and you will be able to continue using it. You will be able to repeat these steps for any other engine versions you previously installed.