Write down your setup
Open the launcher profile you actually use and note the exact Minecraft version. Check the loader name as well. Similar filenames can belong to different environments, so keep this information beside you while reviewing downloads.
Read the file details
Use the official project's file list and look for a build explicitly marked for your game version and loader. Check its release notes and any listed dependencies. Follow the file's compatibility information rather than assuming a newer upload will fit an older world.
Keep one matching build
Before copying a replacement file, stop the game or server. Move the previous Clumps jar out of the active mods folder so you can identify exactly what is installed. Keep a record of the old filename and test the new build in the same profile. Our Versions page is a starting point; the official file details remain the place to confirm compatibility.
Next step: read the installation guide or find a matching download.
Project reference: Official Clumps project and file details.