So I'm in a bit of a predicament here. It looks like when I went to save my sketch file and exported my artboards to a PDF file, Sketch saved over the Masterfile and was converted to PDF. Now, when I try to open it, it's formated as a PDF and not a sketch file, making everything parsed out and unmanageable. How do I reverse this? And why the hell do I feel stupid about doing something so simple? I really hope this issue is addressed, as it's made my day/week even worse as I have to recreate all my pages and naming, and layouts properly.