Not able to edit the nexec probe GUI even after ensuring ACL had Basic Management permission.
I have ensured that my ACL (administrators) was granted the proper access. But I can still only see the start tab and not the other two.
In this case, the Administrator ACL had somehow become corrupt.
Resolution is to create a new ACL. If the newly created ACL has the "Basic Management" permission checked then the nexec probe will show 3 tabs.