TAC-LS buttons disappeared on savegame

[micr0wave]

logged out, all was fine, started game later and suddenly the TAC toolbar button disappeared (or bettter said, it didn't appear at all). The game and all is ok, other saves or new starts are all fully functional, even when i rollback a couple saves on the (now) damaged save, the TAC button is there. Any idea how to fix it ? like ... where to edit what, since it pretty much boils down that the bug is tied to that specific save, so i assume the solution might be found in the save file itself ... but i have no idea what to look for.