Your problem is related directly to a windows application called Modbus Poll. It is Modbus master simulator.
Anyway, you are actually reading first 10 registers in your first screenshot. The second column name (next to Alias) contains the Start Address of registers you wish to read (in your case it's 0). And then you have your quantity of registers that you wish to read (10 in your example) represented in the table.
In this application to change start addresss and quantity you should go to Setup->Read/Write Definition and there select your slave device ID, function code (choose function code either 0x03 or 0x04 to read holding registers or input registers, they may not be the same in some devices), start address and quantity.