After installing Aptbackup open it and tap backup. Be sure to sync your phone with itunes after doing this because it will save your backup of cydia apps in your itunes backup. Then go ahead and upgrade your software on your iOS device. You will then need to jailbreak your device again. After jailbreaking your device again and installing cydia, download Aptbackup again. Open Aptbackup and and tap the restore button. Aptbackup should then automatically download all of your previously installed Cydia apps! Saves time and works well.