How can I get the massive x expansion I installed to appear for use in Maschine 2???
The Massive X Expansions are Massive X Presets, so they don't specifically show Like Maschine Expansions but rather as a Bank under Massive X on the Instruments browser. (Click "All Instruments" then click Massive X, Click on All Banks, and you should see a Bank Name that is the Expansion)
Thanks @Blindeddie