How to restart migaku

[rockbase]

I am not sure if I setup migaku appropriately and would like to start over .
I am using for Japanese and would like to use the browser extension, anki and all the parts.

One problem is I have entered a few hundred kanji as known but the parsing highlights all the hiragana and the cards it makes are a mess.
Also I am not sure many of the kanji I am marking as known when I enter into migaku I get unable to find this kanji. These are all kanji from learning in wanikani but the standard dictionaries are hit and miss.

How bes to take off the chrome extension and anki build and start over