Well you could try the alternative/addon readers, although some Touch models have had problems that the others don't. It is especially easy at this time:
https://www.mobileread.com/forums/sho...&postcount=584
First be sure and copy the two .png files into the folder that Windows opens to when you select the "KOBOeReader" Drive. Then safely eject the drive/device, don't just pull the USB cable. You need to have Nickel process the .png files as if they were books, there should be the usual indication that it is conducting the processing of media. If you don't see it happen power off your device and power it back on you should then see it happening. Once you have the .png files processed and on your home page. Reconnect your USB cable and copy the KoboRoot.tgz to the .kobo folder. Again, be sure to safely eject your device before pulling the USB cable. You should see the "Updating" message then it should reboot. That's it.
Luck;
Ken
There is another menu/launcher program that a Touch user has created:
https://www.mobileread.com/forums/sho...85#post2595985
This might give you a better chance with your device.