No, there is no way to play notes higher than that because the application hasn't been programmed to support such feature. There is also another report of this issue on Amazon reviews where users with experienced said the same.
"Ensemble Composer simply won't play notes like high F above the clef because they're not programmed in for the Contrabass." - Amazon User/Product review.
You can request this feature from the developer through the following email: lotuzstudio@gmail.com
