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.
I think this issue is only present when you're trying to extract the zip file with the Windows default un-zip program.
I can see reports from other users with the same issue, I will report this issue to our second level, but here are some programs to un-zip that you can download, they are working fine.
I just tested with Winrar and it is working fine:
Please in the meantime un-zip your file with one of the programs given above, we will let you know when this is resolved.
Didn't think to try another program - opened fine with 7-zip.
Glad to know it worked wit 7-zip; however, I will leave the ticket opened and our developers will resolve the current issue with the Windows default un-zip program so there will not be need to download another one.