I'm afraid it will upgrade itself again, yes, so you have to give up syncing, using wifi, and all kobo-related stuff, even reading kepubs. Also you have to "trick" the sqlite database to get rid of the initial "Set up your Kobo" screen.
If you are still interested, I can tell you the steps you should follow. Or you can wait for the next firmware release - hopefully that will be available soon, and will resolve the tapping problems.
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