This app used to be a 5 but…

So Ive had this app for a VERY long time now, and its great! The pro version is definitely worth buying. The ONLY thing is that my drawings continuously get corrupted and I dont know why! I cant look at the layers, I cant edit it, I cant even pick up back where I left off and its been driving me nuts for months! A picture Ive been working on all day got corrupted and now I cant finish it and I was /extremely/ upset with that. If you could do ANYthing about that, itd be great, because I cant stand nearly crying almost every time I draw something Im proud of.

TamaruAG about Sketchbook®, v3.6.1