I have the same problem.
Studio One Artist does not allow VSTs, so there is no tab to select a path to find VST locations. From what I understand, Elements is supposed to be recognized automatically by Studio One, even though other external effects are not. Even if I could set a path for VSTs, I am unable to find any application file or folders associated with Elements. Oddly, I downloaded the Izotope Product Portal, and it seems to recognize that Elements has been installed, even though I can't find the software anywhere else.
I've contacted Izotope and Blue, no response yet. If I don't get any info, I'll definitely be returning the microphone bundle. Seems like yet another scam package deal with dysfunctional/limited software.