VSTO 2010 Conversion wizard starting when it shouldn't

Posted on 2011-04-20
Last Modified: 2012-05-11

I created a VSTO Excel 2007 workbook in Visual Studio 2010. I have both Office 2007 and Office 2010 on my computer. When I reopen my project it starts the conversion wizard. Why would this happen. It makes no sense
Question by:murbro
    LVL 14

    Accepted Solution

    You need to open the project from within Excel 2007.  When you just click on the file in explorer the assumption is going to be that you want to use the latest version.   Most people who would install a newer version would want that one to be used, so the behavior you are experiencing is what most end users want.
    LVL 35

    Assisted Solution

    by:Miguel Oz
    I answered a similar question here:

    Basically what happen is that VS2010  has this option: (Under tool | options and  Office tools| Project upgrade)
    "Always upgrade to installed version of Office" checked

    This option will force any VSTO project  to update to the latest installed version of Office in your PC. You need to uncheck this option to avoid VS forcing your project to upgrade

    Author Closing Comment

    Thanks very much

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