Just replied to a reviewer's post on this. You can edit clips using the Arcsoft software unless you are using a mac, in which case you can use imovie. If you clarify what's happening I'll try to help you get it working
I have had no problem with the software. In fact within about an hour of playing with the software I was able to link together a few recordings and edited out sections with ease. If you create movie and then drag down the clip after the title. Click at the top and select edit. You will then be able to play/drag and then use the scissor function at the point you wish to start and finish. Or use the function to remove sections. If you then use the preview button you will see that it now plays the section that you chose. Hope that helps.