I forgot about this site, but I came back, I'm out of ideas for it, maybe in the future there will be more things.
Download and open MelonLoader (attached file);
Press the SELECT button and select the .exe file of the game;
Choose version 0.5.7 (for this you need to uncheck Latest) and press INSTALL button;
After installation you need to launch st3 and wait for the game to fully load, then in the folder with the game will appear in the Mods folder, in which you need to dump mods.
If you have already installed MelonLoader, then transfer ExampleMod.dll go to the Mods folder, then launch the game (the first launch will be long).Â
Tutorial from Fun Plus Essentials.