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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You've reached the limit for "Uploads" and you have a free account which has a 100 MB of upload space in a month. That's the reason why, you get a message that says "Form over quota".
At that state, you can delete some of your uploaded files to normalize your "Upload space" and activate you account again.
1) Open the "Submissions".
2) You can delete your submissions one by one or completely in the "Submissions" page. Also, you can take backup of your submissions in the same page.
In addition, I moved your second question in a new thread, You can access it from the link below:
Your second question will be answered right away. If you need further assistance, please don't hesitate to contact us.