I noticed that the "Drive" expansion for Massive X was not populated within Massive X. Checking Native Access, I noticed that it thought the installation path was that of "Neon Drive". I don't know if I messed up somewhere or if Native Access did, so I'm sharing this in case it wasn't my fault.
To resolve the issue, I modified this registry key to reflect the correct installation path:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Native Instruments\Drive