using PortableAppsPlatform to update Portable Apps not installed with the Platform
I don't remember why, but when I started using Portable Apps, I used to download zips individually, and unzip the zip files in a folder/directory structure/hierarchy I created. That is, I used them without using the PortableAppsPlatform.
Nowadays I quite like this folder/directory structure/hierarchy.
But it's a headache updating these apps. Gotta download the zip, then aim the unzip correctly etc.