Thank you for your info, Wallcraft. I'll delete the files.
I've had problems with Adobe Digital Editions. When I install it, it freezes. I asked for advice about this in another thread and came to the conclusion that as the Sony software can usually transfer epubs with no problem, it's just the odd Harlequin freebie I have this problem with. So I uninstalled ADE and can live without the Harlequins. I did message Harlequin books about this, but have no reply.