Hi Richard,
Over the years I have tried anything and everything that I could get my hands on that would work with Windows. I mostly used Camtasia for a few years but got tired of spending money every year or two for another "upgrade" so I quit back at version 5. They do offer a trial version plus a couple of other versions with different capabilities.
My Camtasia version 5 still works, but generally I use CamStudio 2.7.2 now. When I record from my desktop or tablet, I have it set to capture a fixed region of the screen so that I can have items preloaded just off screen, that I can grab as needed, and drag them onscreen.
HTH,
AL