Not sure if corel fixed the issue but if not here is a possible workaround . Use the "Collect for output" item in the FILE dropdown menu. -File-collect for output -automatically gather...NEXT -check include cdr...NEXT -...NEXT -...NEXT - check "place in a compressed zip (OPTIONAL)...NEXT) this will save all the files including the unsaved cdr.
Close CorelDraw x7. Re-Run Corel and load up your CDR.Save / Save as will now be in their normal state.I understand auto-backup will be disabled however in my case I prefer to do my own backups.so disable Background tasks as previously requested by other members if you like. hope this helps. Good Luck.