The problem with the X.. Organizer is that by default it's set to scan for all images. If you have a lot of photos on your hard drive(s) to catalog, it bogs down the system when you first run PSP, and good luck accessing the PSP option to limit that scan during this operation.

Installation of Corel Paint Shop Pro Photo X.. also installs an applet in memory that monitors for Organizer additions and changes.

Corel's decision to switch from the old Jasc (for newbies, the previous owner of PSP) Browser to the Organizer was likely a marketing decision to better compete with Photoshop Elements. Elements' Organizer, by the way, is much more manageable.