Joomla CMS - latest version;
Hikashop - latest version;
Invoice Manager - latest vesrsion;
I use Hikashop for orders and Invoice Manager for invoices. Hikashop has its own capabilities with invoicing, but i use Invoice Manager for more possibilities. There are plugin that sends Hikashop order data to Invoice Manager. I need to update this plugin, so it can set Invoice number in Hikashop. I don't need to see Hikashop's invoice number in order listings, so i need invoice number to be the same like in Invoice Manager.