Inactive Add (mesh) pannel

Hi.
After installing Blender 2.74 I have no access to Add Properties Panel in Tools Left Panel.
Its grey and inaccessible. When I add some Mesh I cannot make any initial changes on that mesh ( i.e. cannot change number of vertices in added circle ).
I found that one position of my Bookmarks in File Window is inaccessible to (this particular bookmark was accessible in 2.73).

Where is the problem ?

PS: I just copied all settings form 2.73 directory to new 2.74 - to have all add-ons and settings from 2.73.

File / User Preferences / Editing, enable ‘Global Undo’

don’t forget to save user preferences as well to ensure that it stays on! :slight_smile: