Please try to use the follow batch CMD script instead:
Code:
@echo off
REM adapt the following to the actual path of FHBatch.exe
set FHBATCH="C:\Program Files (x86)\FlowHeater V2\BIN\FHBatch.exe"
REM execute FHBatch.Exe
%FHBATCH% "C:\Program Files (x86)\FlowHeater V2\BIN\EuroSimm.fhd"