Live Theme Editor

I used to adjust some elements of the site. It looked fine on desktop but totally jumbled the mobile aspects. The app doesn't let you see the effects in both views while editing. Also had an issue with elements in the editor not showing up on the site after being saved and it did not work in some aspects of the site. Its quite buggy. I was told that I could uninstall the app and all elements would return to the original look and I would lose the webyze theme editor changes. This did not happen and now have to find solutions to this debacle. I am very disappointed in the app and that shopify allows buggy apps on their app store.