Hi,
I can confirm that it works as you suggested, opening the .aip with previous version of AI, removing Windows Installer 3.1 from prerequisites, saving and then generating the setup with AI 14.5.2.
The problem was due to my manual edit of .aip project to try to solve the blocking message opening with AI 14.5.2. I didn't get any messsage error while compiling but the generated setup didin't worked then.
Thx
Alessandro