It could be a problem of path to language files. Please replace EVisionLib.createOCR() at TMainForm.Button1Click method with:
m_OCR := IEVisionLib.createOCR(PAnsiChar(AnsiString(ExtractFilePath(Application.ExeName))), IEOCRLanguageList[OCR_English_language].Code, TIEVisionOCREngine(ComboBox1.ItemIndex));