downloaded 3.3 Rokua upgrade is incomplete but no way to restart download
I started to upgrade my Sailfish OS to 3.3 Rokua. The download failed at cca. 80% since some Internet connection problem. Then the upgrade function indicated the dowload was completed and installation could be started and no ther option is given just start the installation. I do not want to destroy my phone by installing a broken download. My phone is an Sony xperia x 10, plus dual. My question is that: How can I undo the failed download and start the upgrade from the begining.