I'm trying to get the plugin working on http://www.sic-software.beta.tliebig.dyndns.org/?page_id=127, but I'm currently stuck - the inline link does not show and the default contact form is sent instead after hitting submit.
Your plugin and the dependent plugins are all up to date and I have double-checked the each of the dependent plugins are working by themselves.
I have, however, added I18n to the email-before-download.php source file (I'd be glad to share that with you, should you wish to integrate that into further releases). I paid special attention to only mark user-visible strings for translation and leave html source code values intact, but have probably missed something due to not knowing about the internal structure of your code.
Is there any way that you could maybe check the source code to see what might be causing the error?