Prism Launcher

1. Open the Prism Launcher

2. Right-click on Fabulously Optimized

3. Click on Folder

4. Click on .minecraft

5. If you want to reset mod options, delete the config folder

6. If you want to reset vanilla options, delete the options.txt file

7. Download your version from the FO versions on Modrinth. A file should be downloaded

8. Rename the downloaded file to pack.zip

9. Extract the zip file

10. In the extracted folder, open the overrides folder

11. Move the configs folder from step 10 to the folder you opened in step 4