Please note that the new feature 1.40 has a problem with Excel export.
When used in different culture (like Italian), prices can be formatted with commas (1000.12 is formatted 1000,12).
In this case the insert say “fields are different in insert into statement”.
I suggest to insert in functions like  ExportProductsToXLS:
  public static void ExportProductsToXLS(string FilePath, ProductCollection products)
        {
            CultureInfo ci = new CultureInfo("en-US");
            CultureInfo oldc = Thread.CurrentThread.CurrentCulture;
            Thread.CurrentThread.CurrentCulture = ci;
            Thread.CurrentThread.CurrentUICulture = ci;
            using (ExcelHelper excelHelper = new ExcelHelper(FilePath))
….
              excelHelper.ExecuteCommand(sb.ToString());
                    }
                }
            }
            Thread.CurrentThread.CurrentCulture = oldc;
            Thread.CurrentThread.CurrentUICulture = oldc;

In this case, my sb string  is correct, I can download and after I return to my current culture.
Hope to help you, bye !!!