Hi, and first of all [color=blue][size=7]WELCOME[/size][/color]!!! :lol:
I do have some tips. My dog does that and my vet told me to put my knee up to the dog everytime she would jump up and not say a word!! If you speak and say down, or no, it is still reinforcement. So, no words, the action only. Or, you can turn away from the dog and again no words.
Good luck, and Welcome again.