Just downloaded Maschine 3 and wanted to try the new feature where you can upload a flac file and turn it into Stems. I was able to upload a file and play it as audio. In one of NI's tutorial videos about the new features, it shows in Sampler mode that there should be a row of options below the Sampler window that includes a Stems icon toward the right. I don't see this row of icons at all. There's no way for me to activate Stems.
This is my screen: