Blacksheep551

Hi all, Having used an older version of Videopad before, without issue, I'm having trouble with the latest version. I'm using it to create a montage of photos with a soundtrack to celebrate student achievement in our school. Every year I put a rolling credit of student destinations. This year, the credits do not roll smoothly. They jerk - a lot! There are 276 text entries, student names and destinations. This isn't different to any other year, but the encoded file is unusable. This is true encoded at v high resolution or at 1080p. Pc is a 7th gen I5, with 16gb RAM. Intel graphics (it's an HP laptop). Can anyone help? Thanks.