How to properly uninstall an MSI file

So, since uninstalling an MSI file from rapps actually doesn't work, here's how to uninstall an MSI file properly.

1. Go to C:\ReactOS\Installer
2. Right-click an MSI file, then click "Uninstall" (Make sure you pick a correct program from an MSI file).
3. Follow instructions on screen.
4. Tada! The program is now uninstalled.