yeahp, this is basic, but i need to instal JDownloader, i downloaded as a linux version and this is the command line output (Archive Manager):

Archive: /root/Downloads/JDownloader/JDownloader.exe
[/root/Downloads/JDownloader/JDownloader.exe]
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
zipinfo: cannot find zipfile directory in one of /root/Downloads/JDownloader/JDownloader.exe or
/root/Downloads/JDownloader/JDownloader.exe.zip, and cannot find /root/Downloads/JDownloader/JDownloader.exe.ZIP, period.