a simple mod manager that allows you to easily switch between different mods without having a separate instance of Minecraft
You have to have Python installed. It will probably work with any modern version but use version 3.11.4 to avoid any issues
Place the Mod Manager.pyw into the games root directory (%userprofile%\AppData\Roaming\.minecraft) and if you have Python installed you can double-click it to launch it.
you can create a shortcut if you want.