ok, just to confirm... The old Silver recipe (Jiv/Bob/Crot Crystals) moved to Nickel (Rub/Stir Chunks), which moved to manganese
looks like the silver recipe is actually a new recipe...(Stir/Rub Chunks)
While this change was not really intended, it has been an often requested change. It has been added to the changelog for the next release... Manganese didn't really get "swapped" with anything as technically that didn't exist without clowns. The change won't be game breaking on new bases, but will cause a rebuild for some old bases (myself included)...
The team will keep an eye on this change, but for now, it is best to assume it will stay... Sorry.