New Post: how to detect in a client a newest version already installed of a package

Hi,

I have tried with the rule installable when I developed 29.0.1 : <bar:FileVersion Path="C:\Program Files\Mozilla Firefox\firefox.exe" Comparison="LessThan" Version="29.0.1.5239"/>, like: install only if the version already installed is less than the code of version 29.0.1, but it doesnt work.

This should work. Ensure the file version is really 29.0.1.5239 (right click on the file -> property -> Détails
Also, ensure the file path (especially for cmoputers where Windows is in 64 bit)