Portable Apps updater for dummies?

I tried the latest Portable Apps Updater and I'm really confused on how I should use it and how it works.

I have my portable apps in a c:\ drive called "portableapps\

Do I need to install the Portable Apps Updater in the same directory or can it be in a different directory?

And when I execute it, it asks to install Portable Apps 0.90 or something, which when I select a single application, it goes through some processes and says it's been installed. But I can't tell what exactly has been installed and what was updated.

As of right now I much prefer the manual process to update, because I keep an archive of different .paf.exe files, and then extract it to update my portable apps when I want to. Even though it's manual I have control, which is very important to me.

If anyone can explain in dummy's terms of how this updater apps works I'd appreciate it!