Installshield Express 2009 not upgrading installed product bit creating a new entry in Add/remove Programs

Hi Experts,

I need your help ASAP. We have an application that we package via Installshiel Express 2009. When we do a major new release of our software, I generate the new guid for Product Code and leave the Upgrade Code as is. I leave the product name the same and increment the product version by 1.

After I build the release and install, it will create a new entry in Add/Remove programs in  Windows Vista instead of automatically uninstalling the old version and installing the new version. I therefore see 2 entries of my App in Windows Add/remove programs.

Is it right that I only generate the guid for Product Code? This was working about a year ago. The only difference is that I reformated my PC and installed Installshield again. I have tried everything, even used Orca to open the MSI to locate the Upgrade Code in the old version and made sure it is the same in the new version of our software..

Help Please!!

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As of i know you should not change the product code for the new version change the upgrade code and build again, i mean keep the product code same.

If you want to upgrade it in place (not remove the previous version first) do NOT change the product code because you're not truly doing a major upgrade.  If you want to change product version and remove the old version first then the product version can change, and then change the settings in Installshield under the upgrade section to check for any lesser versions and remove them first.

Here's the Installshield summary of when to change codes during an upgrade.

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Manya70Author Commented:

Hi sorry for the late reply. Yes that did the trick. I changed the product code and also changed the Guid in the Upgrade Path section and that did the trick.

Thanks again
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