I have now updated the app and level 255 is working again it doesnt run the way it was but when it goes down to section 4 it now has jam there enabling you to complete this level. So if you have an update please download this and your level should work.
There is no option to clear the cache in the application settings. I've tried uninstalling the app but it's still doing the same thing. And now I've lost all my boosts as well through uninstalling it.