when i run my setup i am saving my settings in registry with path of InstanceName by using [ProductName]
When i do a uppgrade of instance i need to search in the registry for som settings. So i have created search by path "SOFTWARE\Qsys Sverige AB\[ProductName]"!
The problem is that [Productname] in that case no longer representing Instancename instead representing just productname.
In general it is hard to know in application when ProductName = ProductName or when it is ProductName = InstanceName.