Indeed, the first time I click on it, it doesn't open the cheat menu. Is this only happening with my mod installed, or with the base game too?While playing in Sandbox mode and using cheats, pressing the Slave Editor button just removes the general interface on the left of the screen (Slave Activities/Assignments, etc) but doesn't bring up anything new. Editing master still works fine however.
This is from downloading the 2.1 version in your link, the updated latest L patch from the main page, and then adding your mod onto that.
Moved the post over here since it had nothing to do with the main game.
Can you try clicking cheats, then when it doesn't work, click back, and then click cheats again? It works for me then, somehow.