Profiles
Each launcher profile is its own game folder. How to make one, set its version and memory, add mods, import from Lunar or Badlion, and more.
A launcher profile is a separate game folder with its own version, mods, settings, worlds and resource packs. These are different from the in-game HUD profiles, which live inside one game folder.
Making one
- Open Profiles and press New profile.
- Click the pencil beside its name to rename it, and the picture to give it one (or remove it).
- Set Version to 1.21.11. The Version menu also lists other loaders' versions, and picking one switches the loader with it, so choosing 1.21.11 sets Loader to Fabric for you.
- Press Save in the bar at the bottom. Saving a different version swaps Sour Client Core to that version's build; your other mods stay, but may not load on the new version.
Profile options
| Option | What it does |
|---|---|
| Memory allocation | How much RAM the game gets: 2, 3, 4, 6 or 8 GB, or Custom (1 to 32). 4 to 6 GB suits 1.21.11 with shaders and higher render distances. Leave a good share of your RAM for Windows. |
| Extra JVM args | Extra Java options, for people who know they need them. Leave it empty if you are unsure. |
| Launch fullscreen | Starts this profile fullscreen. |
| Run on Java 25 | Experimental. Can give slower processors a few more frames. Java 25 downloads the first time you play. More. |
Mods in a profile
- Sour Client Core is marked Required: it is the client itself and cannot be switched off.
- Included with Sour Client: the performance and quality-of-life mods the launcher installs from Modrinth when you play. Switch any of them off here. The full list.
- Drop .jar files onto the list (or click it to browse) and they go straight into that profile's mods folder. The Modrinth and CurseForge buttons open those sites to find more.
- Search filters the list. The refresh button rescans the mods folder if you added files by hand.
- A mod's menu removes it from the profile.
Only add mods made for Fabric 1.21.11. A mod for another version or loader will stop the game starting, and that is the most common crash we see.
Importing from Lunar or Badlion
The bottom bar on Profiles has Import…. It finds the other clients on your PC; tick a client, pick which of its profiles to bring, and each becomes its own Sour Client profile with its HUD layout. You can also bring across game settings and keybinds, OptiFine settings, the server list, mod settings and which mods were on.
Deleting
Delete profile in the bottom bar removes it (you always keep at least one). It asks first.