Ukuu v17.1 is now available.
An option has been added to the settings window to update GRUB so that the GRUB menu is displayed for 2 seconds at boot time. This will help to recover from a bad kernel update by selecting another kernel to boot. When the GRUB menu is displayed, use the menu option Advanced options for Ubuntu to select another kernel and boot from it. After booting successfully, use Ukuu to remove the new kernel that is causing problems.