If you are using a manual update file like TLOU-Update-from-1.1.3.0-to-1.1.3.1.rar , follow these steps typically used for ElAmigos or similar repack updates:
For the best results with AMD FSR3, it is recommended to have a base framerate of at least 60 FPS before enabling Frame Generation. If you are looking for even newer features, version 1.1.4 (released later) added support for . TLOU-Update-from-1.1.3.0-to-1.1.3.1.rar