After upgrade download link broken

Hello. After you updated your plagin, it does not function properly. The files, which are available on my website for downloading, can not be opened any more. If you click on them a new page opens and it is written “File does not exist”.

You can check it in this page: http://massmediumblog.com/in-english/

I also tried to regenerate permalink but this not solve the issue.

Could you kindly solve this issue?

http://wordpress.org/extend/plugins/wp-downloadmanager/