Knowledge base KB0005

The think-cell add-in disappeared after an Office crash


The think-cell add-in suddenly disappeared in PowerPoint or Excel. In many cases, this is caused by a previous crash of Microsoft Office.


  1. Start PowerPoint [Excel].
  2. Office 2007:
    Click on the Office Button Office ButtonPowerPoint Options [Excel Options] → Add-Ins

    Office 2010 and later:
    Click on FileOptionsAdd-Ins

  3. The think-cell COM Add-in has to be available in the Active Application Add-ins list of both PowerPoint and Excel. If this is the case, please refer to KB0004 for other solutions.
    In case think-cell is listed in another section, you can reactivate it:

    Inactive Application Add-ins

    1. Choose COM Add-ins in the Manage: dropdown box at the bottom of the dialog → Go…
    2. Tick think-cell in the COM Add-ins dialog → OK.

    Disabled Application Add-ins

    1. Choose Disabled Items in the Manage: dropdown box at the bottom of the dialog → Go…
    2. Select think-cell in the list of disabled items → Enable.

    Note: In Excel the separate think-cell Excel Add-in may be listed in the Inactive Application Add-ins list. This is ok as it will be loaded when needed.

  4. Restart PowerPoint [Excel] and see if the problem is solved.

Contact Support

In case you are still experiencing any further issues afterwards, please contact our support team:

Please send us the think-cell log files. To do that, simply go to the think-cell Tab on the Ribbon in PowerPoint and click MoreRequest Support. The log files will be attached automatically to a new email.

If this does not work, you can find the log files as explained below:

  • Open a new Windows Explorer window and type


    into the address field and press Enter.

  • If you want to browse to these directories but cannot see them, they are probably set to invisible. You can change that in Windows Explorer by checking:

    • Windows Vista and Windows 7:
      OrganizeFolder and search optionsViewShow hidden files and folders.
    • Windows 8, Windows 8.1 and Windows 10:
      ViewShow/hideHidden Items.
  • Please send all files with the extension .log contained in this folder to our support team. This may be any of the following files: POWERPNT[_log].log, EXCEL[_log].log, TCMAIL[_log].log, setup_think-cell_xxxxx[_log].log.