the graphics editor

Welcome. Problem: corrupted restored after deleting the file .cdr. Visible thumbnails (but not all), the files themselves will not open. Tried using tools, but without the key the recovered files are not saved. Perhaps there is some alternative? The cause of the problem: the Files were accidentally deleted and then restored using R-Studio, after that do not open.
Please tell me how to fix it, interested in the correction of cdr.