PS Elements 2018 Organzizer Fails to Load

You seem to be having a problem deleting preferences using the keyboard shortcut.  Have you tried a full uninstall/reinstall of the program?  If so, did you check the box to delete preferences?  If not, that is what I would do next.  When you uninstall the program from the Windows Control Panel, it should bring up the following dialog.  Check the box to remove preferrences.

markg40533220  wrote Initially Organizer was working, but eventually it would not load on its own, I had to open Elements first, and then Organizer. Now, Organizer will not load at all either from the PS start up splash screen or within Elements.

I am a little confused by what you are describing.  Did you initially set the Welcome Screen to always launch the Organizer on start?  Is it still set that way?  If not, what do you have it set to?  Have you tried toggling the options to see whether it fixes the problem?

Now, Organizer will not load at all either from the PS start up splash screen or within Elements.

Are you saying the Organizer won't open if you click the launch button from within the Editor?

Are you able to open the Organizer at all?  If not, here are a couple of things to try.

1. Launch the Organizer from the PhotoshopElementsOrganizer.exe file found at:  C:\Program Files\Adobe\Elements 2018 Organizer\.
2. Delete the Preferences file:  Immediately upon launch, hold down the Shift+Ctrl+Alt keys.  Say yes to the pop up dialog to delete the Settings file.