yes, it should be like that, no VAT code filled in. Wish done for Lithuania in order to export invoice lines summed up by the VAT code to the tax authorities.
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...