After uploading your chat, you receive an e-mail with your login data and a link to the editing page. In case you will forget your PIN you can still log in to the editing page by clicking on the link.
Additionally, you have the option to log into the zapptales app by going to "My chats", clicking on the plus sign in the bottom right corner and log in under "log in to different chat". After logging in, you can see your chat and login data in the "My chats" section. With a click on the chat in the app, you easily get to the mobile editing page :)
Keywords: I do no longer remember my PIN, my PIN doesn't work, login, log in, editing page, my chats