Recently my artstudio started to flashback from time to time and my painting collapsed into simple stripes when I re-opened it after the flashback (It looks fine in the thumbnail in the gallery but when I open it it collapses). I cannot have my work back no matter if I re-start it again and again or "undo" it. I've worked on that painting for a week so it's really frustrating T_T I'd really appreciate it if I can get any help or suggestion about it.

Thanks!