The Product Code and the Upgrade code are different. The version is different. There is no upgrade path.

The user installs the setup to an existing folder. And the user files already existing in that folder are deleted.


>>I thought I had forgotten to change them. But no.
>
>Just to be sure I understand: Are you saying the Product Code and Upgrade Code are the same in the new setup project as in the old project, or are they different?
>
>>When I install it removes all user files in the folder, files which were not installed by any windows installer package.
>
>Do you have any entries in the Upgrade Paths section of your InstallShield project?