Hello, I have recently downloaded the plugin and I'm having some problems. Apparently everything works fine, but when I save the invoice items disappear. I want to buy the theme "default with logo" or ask you for creating a new template because I liked the plugin, but I don't know if this problem is for the free theme I'm using or anything in particular with the plugin. Could you help me with this please? I'm using WP 3.8.3
I see @fredericlalonde posted a similar problem but there is no definitive answer. I'm using the plugin with the Spanish language. I don't know if this has anything to do with.