The "1 Step Hack" is at
https://www.mobileread.com/forums/sho...&postcount=303 and has no step 5. There is no need to delete any duplicates as they have the file names changed so that they aren't used. They are still there in case you should want to try just restoring individual files. This version of the hack might be your best bet.
You should note that most of the tweaks are tailored to the AuraHD, so you might want to consider connecting to your PC and adjusting the settings pointed to at
https://www.mobileread.com/forums/sho...&postcount=331 to reflect those that you find work best with your Touch. ( The current Koreader port does find and apply some settings based on the model detected, so your Touch might not be too far off just as it is.)
Luck;
Ken