While it’s definitely not ideal it looks like they have a beta API... can you use it to extract your data? Or at least extract the most important data? If you s

While it’s definitely not ideal it looks like they have a beta API... can you use it to extract your data? Or at least extract the most important data? If you still have the founders’ contact info in your email somewhere another option is to contact them directly and ask for help. Any good founder would quickly task someone with making a miffed but loyal paying customer happy again.