@kvmknight never ever store your user generated content, files, etc in some bin folders of an application. You will loose them if you uninstall or update the software. Literally, that's the wrong place for that.
But if you know where your vital files are than you should easily find them in your backup.
Have you also looked in the bin? But I am. It sure if during update deleted folders will be in the bin. That might be worth a try.