I've used the Symbol Sprayer in Illustrator to create a huge pile of symbol instances. I expanded the object so now I have many instances of those symbols in a group. I duplicated the group, and now I want to make all the instances in the second group point to a new symbol.
How do I say "Given these symbol instances that I have selected, please change them to be instances of a different symbol"? I've looked through all options in the Symbols palette, as well as the context menu for the selected items, and I can see nothing relevant.
(I'm using Adobe Illustrator CC 2015.3.1 Release, version 20.1.0 64-bit, on Windows 7x64, in case it matters.)