I'm not sure precisely when, but in the last few weeks, the LTN integration switch has disappeared from my Space Elevator menu. I'm guessing a recent update with either SE or LTN has broken the integration, but I'm not sure which, or when, or if it's just me. I have tried removing all other mods, and have tried starting a new map, to no avail.

Here's a link to the save in question.

https://drive.google.com/file/d/1mctrBAOXqGRzPSXTylWZyKe_ukx3LS7a/view?usp=sharing

Have the same problem :(

I loaded your savegame and can still see the switch and toggle it properly. Maybe you clicked in the center on the thing labeled "Space elevator wire connection"? I clicked on the larger structure around it that's just labeled "Space elevator".

This is embarrassing... I am simply blind. I was looking at the wrong spot on the screen when I had the elevator menu open. I see it now. Thank you.