YuS - following this:
The PortableApps.com Menu can automatically add apps in PortableApps.com Format. Just download the the PortableApps.com Installer (ending in .paf.exe) for the app you'd like to add (like FileZilla Portable, for instance). Then, in PortableApps.com Menu, click Options - Add a New App - Install and then select the FileZilla Portable .paf.exe file you just downloaded. The PortableApps.com Menu will automatically install it to the proper location for you.
But, why does the platform try to make a TCP connection before installing, since the app Installer has already been downloaded? [is it for stats, i.e. Counter]
It doesn't. The current version of the platform doesn't even have a connectivity component anywhere within it. Sounds like a hyperactive software firewall. Or you're infected with something.
Sometimes, the impossible can become possible, if you're awesome!