The PlayMakerFsm Inspector has been simplified in 1.9.1. It now only shows description and controls (Input variables and Inspector Events). You can still edit everything in the FSM tab in the main editor.
The idea is the Inspector is for previewing and tweaking inputs, and the FSM tab is for editing.
But you can revert to the old Inspector if you want by selecting Show Full FSM Inspector in the PlayMakerFSM settings menu. Note this is a global setting.
EDIT: I'll probably add a note when there's nothing for the PlayMakerFSM to display when open. Something like: Add a description and expose inputs in the main editor.