I keep getting the message that "Live cannot access the undo history file...

I keep getting the message that "Live cannot access the undo history file and is switching to a memory based undo" each time I open Live. What can I do to fix this?

Please try trashing the Undo.cfg file and the Preferences.cfg file. You will find these files in the following paths:

* Windows (Live 3): (Installation Directory)/Ableton/Preferences
* Windows (Live 4 and 5): C:\Documents and Settings\your user name\Application Data\Ableton\Live\Preferences
* Mac OS 9: /System/Preferences/Ableton
* Mac OS X: /User/Library/Preferences/Ableton

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