From the email from Lucia:
The only other issue I'm having is that I have no "Tissue" to choose from (because we're measuring different traits/phenotypes), so I created "Trait" as a new "Tissue." However, it's asking me to choose a ProbeSet which isn't applicable to our data, I don't think.
It seems like some of the data does not require a ProbeSet, and in that case, it should be possible to add it without one.