And here is Dave's bug fix, if your pop up enchanting window works off-screen
I've posted a reply to this on the technical forum. The short answer is that the pop ups are appearing 'off screen'. You need to close the program edit the config file to increase the screen resolution (if you are already at 1024, you can increase to 1600). Restart the program, click on a item that can be charmed, move it nearer the centre of the screen (check that it reappears here when you close it). Shut down the game reset the resolution and away you go - took me ages to figure it out.
I got frustrated when I played one game the whole way through with no charms and then when I started the game again I had the same problem.