I Seem to have done this too. my saves corrupted and with a friends help we got them back, I didn't want to lose a 184 and a 62 level character. I really don't know how he saved them but I had to turn all the dlc and mods off to do it and lost everything built with mods (everything basicly, I have around 180 of them). I'm guessing its something that wanted me to craft and take a chem to uninstall first that has deleted my furniture tab, maybe the soylent green or warehouse extensions to manufacturing extended or the synth cloning facility mod. anyway I hve only myself to blame for an overbearing save file size and deserved to lose my hoard and towns and now after turning all my mods back on I have to hunt down the furniture tab.