John - Once again I will refer to the Portable Apps Suite. For me one of its strengths is that Nothing actually needs to be "Installed" on your PC. By that I mean that each programme is self contained within its own folder and keeps its settings and "memories" in sub folders. As such none of it adds stuff to the PC Registry, and if you want to remove a programme, you just delete the folder it is in. This also means that they will run from any memory device your PC will read, so you can use USB sticks, put it on an SD card, any external hard drive, or just a folder placed ANYWHERE on your computer's fixed drives.
If you want to update to a newer version, you just need to copy the folders where the "personal settings" are stored, install the new version then copy your personal settings to the relevant folder on the new installation.
Unlike much "Installed software" the portable programmes in the suite do not automatically load themselves into the background, and hence hog your computer's working memory and resources without you knowing.
Quack!
GtD.