Hello, Please see attached image, I have two questions about the euro mini icon/symbol in files view. 
1) How do I change to an AUD (Australian Dollar) icon I have, and what size should it be when uploaded.
2) How do I change the size of the icon, if you see image it is too big.  Is it one of the picture settings in jdownloads configuration - picture tab

thanks

Hi,
see pic. 

Please note that you should update to the new 3.9 release (when possible).