FM 2013 Editor didn’t dissappear from the game, but it doesn’t install like in the last games. I will say you how to find football manager 2013 Editor if you have a Steam account.
First, you need to get in the Steam account and application on your games. From there you click on All Games -> Tools. There you will find the FM 2013 Editor and FM 2013 Resource Archiver. Right click and install the tools that you need. Good luck.