Dann,
Thank you so much for replying to my post. I could probably have a go at doing what you suggest, but will downloading the same program again make any difference? Another thing I was concerned about was .. if I delete all traces of Photo Stage from my computer will I end up with an Unlicensed Version and have to pay for it again? Or will my Registration Code work? Will this count as one of my 'uses' of the Registration Code meaning I am heading towards having to buy it again?
What I have done is to download the program again from the NCH PhotoStage website without deleting the previous one, run it, and I see now that I still have a Licensed version without me having to do anything. My previous version was v8.56 and what is showing now is v8.61. Unfortunately, this hasn't made any difference to the problem of the video clips 'skipping' backwards.
But I have done a bit of research into the problem of 'jumping' video clips and have come to the conclusion that it only 'jumps' when the start of the clip is 'moving' (obviously, as if it's static it skips from one static part to another so there is nothing to see).
What I have done is to put a 'moving' clip onto the Story Board, then very slowly move the red cursor line to the right until the 'scissors' appeared. I then cut the video at that point, which gave me two separate clips, the one on the left being 0.1 seconds and the one on the right being the remainder of seconds.
Then on the left of the 0.1 second clip I put a Circle Transition. The Transition between the two split clips I put as No Transition (if the program has put one in you can do that by clicking on Remove on the Transition page). I then ran the Preview, and instead of 'skipping' backwards the clip just hesitated slightly before moving forwards. So in the video I put up in my original post, I have been through all the video clips that were causing me a problem with 'skipping' and have split them all into two by cutting with the scissors at the very start of the clip, putting a Transition to the left, and No Transition between the two separated clips. Exporting as an MP4 I have put it up on YouTube so you can see how this has ended up as compared with the original. Not as 'smooth' as the VideoPad one, but certainly very acceptable as there is now no 'jumping backwards'. In fact, in the Milky Way clip near the beginning the transition is perfect ... no hesitancy or jumping at all!
https://youtu.be/BOFG-M9209w
Hugh