Hi Chris,
as far as I can see, you deployment strategy is incorrect. In Windows, you need a unique Product GUID for one product.
For example: we have the same software (LSZip) but several different releases (LSZip for Clarion 6, LSZip for Clarion 7, LSZip for Clarion 8, etc.). In Windows, you need a unique Product GUID for each releases. This is expected and by Windows design.
So what you need is multi-Product GUID in your deployment (similar to the attached screenshot).
Or this:
http://www.lindersoft.com/forums/sho...5922#post55922
If you need help with this, just let me know.
Friedrich