Aliasdictus

Hello, sorry to bother you but I am running Videopad on Windows 10, successfully until now. When the program starts it only appears halfway up the screen, so the top half of videopad occupies the lower half of the screen. Of course it will not run and the only way out is Ctrl/Alt/Delete. Nothing has been upgraded or changed and I am at a bit of a loss, all other programs work properly as do half a dozen other NCH programs. I suppose it must be something really simple but I am a bit stuck and wondered if you might have any suggestions. Very many thanks David, Oxford UK