Custom Sheet was deleted?

I've been working on a custom character sheet modification for my game, Chronicles of Yamato, for the majority of several days and if all my work is lost I will seriously pull my hair out. I saved my work just now and logged into the game 'editor' as usual to see how it looked (since the preview window isn't rendering it properly) and my character sheet was blank save for the letter 't'. Puzzled I went back to the site where I had been painstakingly entering/editing over 1000 lines of code only to find the same letter 't'. I've tried recovering my clipboard, rooting through my browser cache but so far I have not been able to recover my work. Is there any possible way to do a roll back of a particular custom sheet or retrieve the save of my sheet previous to the last one before the html editor apparently glitched out? Pleeeeease. I don't have a back up and I really don't want to start over :( I barely know what I'm doing as this has been very tedious. I promise if I get some help this one I'll be careful to back up my work as I go in future! I'm using Google Chrome, Version 45.0.2454.93 m, Windows 7.

I'm checking with the other devs to see if this is possible. For future work, I would recommend keeping your work in an external program like Sublime Text or Notepad++ and copying your code over from that. It's what I personally do.

I have every intention of doing so from now. on. I appreciate your response. If you need any additional information from me I would be glad to help out however I can!

We don't currently have the ability to roll back custom character sheet data.

So there's no way to recover what was lost? That's tragic. :/ I wish I knew what caused it. Ugh... I know its not your fault I lost everything, but I was kinda hoping as a paid subscriber that there might be something that could be done. But if it's a technical limitation, so be it. Thanks for trying.