Oh dear god…
I’ve just realized I’ve sent you to the wrong tutorial!!!, no wonder you are kinda lost!!! 
Apologies, I made a huge mistake by pasting the wrong link…
This is the guide you must follow → APIM Sync Settings Not Saving, VER_ERR08 Errors, Cannot Perform Master Reset or Upgrades/Updates (Solved), hopefully it will make a lot more of sense…
Again, I’m sorry for the confusion.
I’ve edited the original message as well to point to the correct one…
And yes, you should try the rwdata cleaner utility first. If that works, you will be able to upgrade right away.