Assume it's a minor glitch with your installer. Supposed to pick an install directory. I picked an existing directory and it took me back to the directory confirmation, ie C:\Nexon\Mabinogi. At that screen, i typed in an additional \Temp at the end of the directory, so it would create a new folder and all files would go directly in there, note not that listed directory, that was just an example.
Told it to extract desired files, it went through the process. It finished, and there was no folder or files. I double-checked the directory i had designated, then went to C:\Nexon to look and make sure it didn't create a mabinogi directory for some reason, that's not where my mabinogi is installed fyi. No files there either. And in case it somehow thought i deleted everything in the directory specification but the \Temp, i checked for a C:\Temp and the desktop and neither had the folder/files.
Actually went back and had to redo the downloads to get my files. It's possible that i screwed up the directory somehow, but given how i went about it, i don't see how i would have managed that, and i also can't find the files either. So i'm assuming there were no files.