"FLooCH: If you're having trouble downloading the update, please do the following within Impulse:
-Click the blue menu button in the upper left
-Click the 'Reset Data' button
-Close impulse and relaunch it. You may notice a long update time, which is normal as it is rebuilding the deleted info."
searchfu brought me to this thread for this answer, is it in it's own thread elsewhere? but thanks Rosco_P. +1