Also, I'm curious what features in the 'Explore' button in the UI, but it tells me that I must have an extractor installed although many are installed

@edward_smith It's not very clear in the UI right now, but the Explore feature requires there to be a model (https://meltano.com/docs/plugins.html#models) for the extractor in question, so that you can use Meltano UI to build some basic reports: https://meltano.com/docs/analysis.html#explore-your-data Meltano comes with models for the sources listed here: https://meltano.com/docs/analysis.html#supported-data-sources, but not for any sources you've added yourself