JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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 can do that by reverting back to the version before you have applied the theme: How to View Form Revision History
However, you must remove the powered by logo since you are using JotForm to build your forms, while in the same time promoting other builder?
Not sure what would be the purpose of that, but if you are looking to show where the form was built on, you must use JotForm logo instead of advertising something that is not true.
I have marked the two jotforms in your account for inspection to see if you have done so or not, and if not will remove the fields for you.
Adding them back might result in the form being removed completely.