I'm in Web Designer 9 premium, working away for several hours, tried to save and got this error "internal program error 1143.k.st.es". Tried running as administrator. Tried opening from File > Open Recent > Backups folder, I can see an appropriately time stamped file, but when I try to open it I get "An unknown PNG error occurred". I know I need to upgrade to WD10 which I will do as soon as this is resolved but is there any hope of recovering my efforts prior to this error?