How to use filer app ?

i downloaded this app call - filer (formerly downloader a href="http://itunes.apple.com/us/app/filer-formerly-downloader/id318884764?mt=8)" rel="nofollow"http://itunes.apple.com/us/app/filer-for…/a and i dont know how to use it and download can anyone tell me what the use or how to work this ?