When FeedNotifier Portable is used and running when the PC is ShutDown, at next use the following error-box is given :
Feed Notifier Portable (PortableApps.com Launcher)
Feed Notifier Portable did not close properly last time it was run and will now clean up. Please then start Feed Notifier Portable again manually.
I've been using the regular FeedNotifier for years and never had similar problems.
The same applies to Virtual Magnifying Glass Portable :
Virtual Magnifying Glass Portable (PortableApps.com Launcher)
Virtual Magnifying Glass Portable did not close properly last time it was run and will now clean up. Please then start Virtual Magnifying Glass Portable again manually.
I think it's all related to the fact PortableApps doesn't leave the data at the original location.