You can find application-specific folders in the following locations. There is also an ApplicationLogs folder in these application-specific folders:
Mac OS
/Users//Library/Preferences/StageManager.BD092818F67280F4B42B04877600987F0111B594.1/Local Store/Adobe/SPSDExtendCS5
Windows XP
C:\Documents and Settings\\Application Data\StageManager.BD092818F67280F4B42B04877600987F0111B594.1\Local Store\Adobe\SPSDExtendCS5
Windows 7/Vista
C:\Users\\AppData\Roaming\StageManager.BD092818F67280F4B42B04877600987F0111B594.1\Local Store\Adobe\SPSDExtendCS5