I installed the demo, but I always get an error message: An error occurred while loading Plugin...(error comes with each plugin)

I installed the demo, but I always get an error message: An error occurred while loading Plugin...(error comes with each plugin)
Details: Plugin .... internal exception. An error occurred while implementing initialization.
For input string: "0,000417"

Information is not enough. AccuBarcode Pro or Pro Plus? Mac or Windows? Which version?