Current windows version unfortunately has a bug that will be fixed in the next version. Open your settings.json located in your qora installation folder and edit the path so that it contains double backslashes instead of single ones!
That might help regarding your problem.
You can use '/' with Windows (it doesn't work so well with console command programs as '/' is the option prefix rather than '-' but it works fine for POSIX things like file operations).
(so you can use '/' in config files for both Linux and Windows assuming that is being used to identify file or folder names)
Sure "/" will do fine too, that is also the way it is already fixed in the code. The variable with problems is only used in windows version to avoid right restrictions.