Try extracting the contents of the tgz or zip, or opening it in a compatible tool. You should see the contents are in a folder named "translator-ojs-3_0_0-0".
If you have opened the file in place, (for example, using the zip in Windows Explorer), you can rename this folder within the archive to "translator".
If you have extracted the files, you can rename the folder to "translator" and then re-compress the extracted files.
Use the new zip or tgz archive with the changed folder name.