I was recently the victim of not being able to view my plugins once i installed them through my FTP and couldnt view them in the management side.
Stupid me when I unzipped the folders I just threw that folder in the plugins side of my FTP. If you are unzipping the file actually open the file and pull out the next folder which is actually the file you need to upload.
If no one followed me there here i can explain.
Ignore the first plugin file and get the second one and upload it.