You might want to check the modification dates of the 2 known items to see if that tells you more.
AdobeResourceSynchronizer.app - does not seem to reside on my drive
Canon IJ Network Scanner Selector EX.app - I have two of these, each in different Canon folders, with the same version number but different modified dates (Oct 2012, Sept 2014)
*) DrivePulse is a menubar item, and its pulldown menu sports an ‘Event Viewer’ listing the latest information about the items checked in DP’s prefs, like login item changes.
Checked this...it didn't have anything with names of log-in items. There was only a long list of Drive Genius activities.
Unless you know otherwise (and you’ll probably recognize an issue when you see it listed), it is usually fine to ‘Ignore’ the warning.
I think that's what I'll do. Thanks very much for the help.