If you have a version of Photoshop I would use that.
You will get used to it. There are many guides out there.
Photoshop Photo Editing Tutorials - TutorialOutpost
If the original software was bundled on an HP computer there might be / should be a Restore CD for that HP computer.
You could also try to contact Arcsoft but if it was an HP bundle they probably won't be much help.
ArcSoft.com : Support : Customer Support