When I added the option to right-click an entry in the list to copy the path to the clipboard, I forgot about the impact that would have when reordering songs in the Windows 10 version. I will fix that - thanks for letting me know. The "copy to clipboard" option is just to copy the file path, not to copy the file itself. I probably should update the text to read "copy path to clipboard".
As far as reimporting an existing file, you can do that on your surface tablet. Just tap the folder and navigate to your storage location (Listed under Settings->Storage->Set MobileSheets Storage Location but the default is C:\Users\<your username>\AppData\Local\Packages\41730Zubersoft.MobileSheets_ys1c8ct2g6ypr\LocalState), and find your file in there.
Mike
As far as reimporting an existing file, you can do that on your surface tablet. Just tap the folder and navigate to your storage location (Listed under Settings->Storage->Set MobileSheets Storage Location but the default is C:\Users\<your username>\AppData\Local\Packages\41730Zubersoft.MobileSheets_ys1c8ct2g6ypr\LocalState), and find your file in there.
Mike