Hi John,
Since multiple versions of Advanced Installer can be installed
side by side, several rules must be fulfilled.
The most important is that the install locations, registry entries should differ from one version to another. If they are not different, the present items will be overwritten when a new version is installed. Here's the
Upgrades article.
This is way we are using the
ProductVersion in the installation path.
If there is anything else I can help you with, please let me know.
Best regards,
Dan