Hi @Anonymous,
It sounds like you have plain AutoCAD installed, or are running AutoCAD Mechanical as a Vanilla profile.
Check the profile being used in OPTIONS under the Profiles tab. If you see <<ACADMPP>> and <<Vanilla>> you have Mechanical running. Try setting <<ACADMPP>> as current and check the workspace. You should see the Mechanical Workspace at the to top of the list.
If you do not see <<ACADMPP>> in the profiles, this is likely plain AutoCAD and Mechanical will need to be installed. You can do so from your Autodesk Account.
Please let me know if this helps.
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All the best,
Cheryl Buck
Technical Support Specialist

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