[itimpi]

You have two chocies:
- Open up a CMD window and run it from there.
- Create a shortcut to the Calibre2opds.bat file and run it via that (which I find easier).

If using the latter method then you edit the properties of the shortcut to add any required parameters after the file name in the "Target" field. These are the same parameters you would use if running from the CMD window.

One disadvantage of the shortcut method is that the Window disappears as soon as the command completes so you would not see any error messages. My recommendation would therefore be to start by using the CMD window, and once you know what parameters you want you can then add them to the shortcut and run via that method.

In your case you probably want to give the path to the Calibre library folder as a parameter leaving the remaining ones to default.