Same script behaving differently on different computers (all Windows 7 64bit and with AE CC2014)

I wrote a script for AE CC2014 for a TV station.

The purpose of the script is to create titles and resize graphics elements based on the text the user entered and then add the comp to the render queue.

But for some reason on most computers (Windows 7 64bit), the save dialog always opens by default on the After Effects scripts folder. Except on one computer where it does what was intended to do, the save dialog interface opens on the last folder the user saved in.

I don't understand why the SAME script and the SAME project are behaving differently on different computers (all with Windows 7).

If anyone has an idea...

Thanks