This is the 2nd software I am testing and what a disappointment. I added a customer and wanted to change his default billing currency - that is not possible Once you set the currency for the new customer and save, it is not possible to change it. And guess what it is also not possible to delete the customer which was never used / invoiced... Guys, that's a bug. I completely understand your concerns from the IT perspective to safeguard businesses and preventing them accidentally deleting customers. However it should not be possible to delete the customer if he had any invoices issued. If there are no invoices tied or the customer is brand new, it should be possible to delete it. Same with the currency adjustment.