The app crashed and I lost my work

I accidentally deleted one step from the history panel (somewhere at the beginning) and after that the app crashed. When I opened it back there were just a few lines and in the history there are yellow exclamation marks next to every step. What shall I do? How can I undo the delete from history(I tried command+z but it doesn’t work)? Or is there any other way how to fix it? I really need it, it took me a few days to make it. I will attach photos so it’s clear. Thank you in advance! Jan

If you contact our support team, we are most likely able to restore an earlier version of your work. Apologies for the inconvenience.

Thanks, I’ve already texted them and now I’m waiting for their response.