The blueprint upgrade button has no effect，Cannot upgrade from steel box to iron box，Unable to flip blueprint with R key，It's very inconvenient, I hope future updates can solve it

The upgrade, maybe. I'll look into that.

But the rotate doesn't work because the chests themselves can't be rotated. But I added a hotkey for that. I understand it is not great and it might cause problems with rotating certain blueprints but that is all I can do.

Upgrades enabled in 5.0.0

Thank you。