Acrobat Pro 9.5.2 locking up

On a mac running OS 10.6.8 my Acrobat Pro 9.5.2 locks up with a transparent gray box. The only way out is to Force Quit the program. I also have Acrobat 7 loaded (but not running) as this version of Acrobat works. Do I need to deinstall both and reinstall 9 or is there something else I'm missing?

Moving this discussion to the Acrobat Installation and Update Issues forum.

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    Action                                                                  Update
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    Hive                                                                               HKEY_CURRENT_USER
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    Value name                                                                  ELUA
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    Stop processing items on this extension if an error occurs on this item                                             No
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    Action                                              Update
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    Hive                                                  HKEY_CURRENT_USER
    Key path                                           software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf
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    Stop processing items on this extension if an error occurs on this item                                   No
    Run in logged-on user's security context (user policy option)                                          No
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    Apply once and do not reapply                                                                                             No
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    Action                                                                                     Update
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    Hive                     HKEY_CURRENT_USER
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    Stop processing items on this extension if an error occurs on this item                                   No
    Run in logged-on user's security context (user policy option)                                          No
    Remove this item when it is no longer applied                                                                            No
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    Properties
    File Extension                                 pdf
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    Options
    Stop processing items on this extension if an error occurs on this item                                   No
    Run in logged-on user's security context (user policy option)                                          Yes
    Remove this item when it is no longer applied                                                                            No
    Apply once and do not reapply                                                                                             No
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    pdf (Order: 2)
    General
    Action                                              Update
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    File Extension                                 pdf
    Associated Program                      C:\Program Files (x86)\Adobe\Reader 10.0\Reader\AcroRd32.exe
    Set as default                                  Enabled
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    Stop processing items on this extension if an error occurs on this item                                   No
    Run in logged-on user's security context (user policy option)                                          Yes
    Remove this item when it is no longer applied                                                                            No
    Apply once and do not reapply                                                                                             No

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