Hello jan!,

I am really sorry for the delay of this reply as it is a weekend for us here.
Unfortunately we do not have setting to configure on this in current system.
But you can download my attachment file and replace in JoomlaFolder\componentdownloads\com_easydiscuss\controllers\attachment.php and see is it meet your requirement? (Remember do the backup first before replace the file)

Thank you Arlex, guest cannot download attachements now,
they are redirected to the discussion home page, any way to show a message until they know that after registration they can download ?

Hello Jan,

The hack which Arlex provided already contains a message when the user does not have access to download the file,

DiscussHelper::setMessageQueue( JText::_('Please login first only can download the attachment file.' ) , DISCUSS_QUEUE_ERROR );

Hello Mark,
i'd just tryed again as a guest but i didnt get a message, it redirect me directly to the easydiscuss home page ! please try to download the file in the url bellow.

update: as guest some times it show the message and some times no ! when i login i get this message !! please try as guest and after as login with the attached login.
it is not a cache issue ?

Hello jan!,

Yes, it seems like you're right, I have temporary disabled this plugin - System - jSGCache, it should work fine now. Can you give it a try?

Thank you, seems working now,
jSGCache is the site ground plugin used to activate super cache, with this plugin disabled cache is not running realy good

seems working without hiding the field !
thank you Arlex

You are most welcome, glad that your issues are resolved now.