In the Radiative menu, it's at the very bottom.
Purchasing the core STAGE 2 LOREDs will unlock the Extra-normal upgrade menu again. Them being, Water, Seeds, Trees, Soil, Humus, Sand, Glass, Axes, Wood, Hardwood, Draw Plate, Wire, Liquid Iron, and Steel. Purchasing upgrades before you own any of these can potentially soft-lock the game forever. That's why I also added Radiatve upgrades to give you bonus Steel, Wire, Hardwood, and Glass after doing Chemotherapy
Yes, but at least then you can get un-stuck with the help of tasks. It's also possible to not have enough Wood, Axes, or Hardwood for any of the 3 to produce anything, but that is when the task board comes back and future quests become quittable.
I guess that also means I don't need to lock Extra-normal upgrades, since if you buy an upgrade too early, you can do tasks to get what you lost
Once you have a good handful of Radiative upgrades, you will probably never get soft-locked or need to grind for resources to get un-stuck
