Fair warning: I tried to delete one recolor of one of the hairs (the short choppy one comes with 2 blacks) and ALL of the TS2 store hairs disappeared. They were still in the DL folder, which is weird, but I've re-dl'd them to see if that fixes it.
That happened to me too, just re-start bodyshop/the game and they'll re-appear...sans the group you deleted sadly.
Is there a way to be able to recolour these? I tried exporting them from bodyshop and got an error, and when I opened one in Simpe the texture files are only 128x128.