I am using the Forge single player instructions in a fresh .minecraft and followed them to the point where it says to go find .minecraft/mods/TerrainControl/worlds/your_world_name/.

This path way is not even being created, and I have tried generating 10 TerrainControl worlds and re-installed twice. I know that it notes that Forge saves might be somewhere weird but I can't find it at all.

Closing this. If it still happens, please leave a message here and I'll reopen it.

And if you try the dev build (linked on the home page of the wiki)?

Okay, never mind. I tried dev build, but it did the same thing. I know it said strange places, but it turns out it generated a mods folder in Documents and the controls are there.That is rather random...

And that is certainly not where it should generate. I thought I had fixed it in the dev builds...