Permanently Delete Stubborn Modrinth Instances

Locate the Modrinth App Data Folder

Navigate to your operating system's hidden application data directory to find where Modrinth stores instance files. On Windows, press Win + R, type %appdata%, and hit enter to open the roaming folder. Look for a folder named modrinth or similar within this directory to access stored instances. This step matters because the visible launcher list often references cached data that survives simple deletion attempts. You will find a subfolder containing JSON files that track instance metadata and download paths.