Operating System

Windows, Linux

Description of bug

MultiMC is trying to find "com.mojang.rubydung.RubyDung" but fails because the path is "com.mojang.minecraft.RubyDung" #5073 reported it over a year ago but it didn't get fixed.

Steps to reproduce

Launch Minecraft version rd-20090515 with MultiMC.

Suspected cause

MultiMC is trying to find a Java class file but the directory it's trying to access is wrong.

This issue is unique

• I have searched the issue tracker and did not find an issue describing my bug.