Invoice date - format problem

The app is great, I want to go for extra paid could sync.. but there is a big problem..
There is NO WAY to change “invoice date” formatting.. it is taking it from my computer and my MacOS is not english which makes ainvoice date field an error: even entire invoice is english this one line is not english - result diplays strange and prints with font error.

Please add formatting to that field like aother incoice apps have, so we can set it up according to our country needs, ex we do not want to use months in text but only digits.

I know I can change it in my OS, but I would like not to do it, but just override the DATE Format for that APP only… example I use 23.01.2015 for MacOS, but use 01/23/15 format for the Easy Invoice only.

HELP.

arcadius1974 about Easy Invoice (PDF generator), v2.0