Copy your entire POPFile directory on the other machine. Make sure you follow the same steps you performed to configure your email client on the first machine on the second machine.

For Windows users, the simplest way to ensure a correct setup on the new machine is to;

1. Copy the entire POPFile directory and its subdirectory and contents to the new machine.
2. Re-install POPFile on the new machine using the Windows installer, that will get your mail client(s) configured correctly on the new machine and will get all registry entries setup properly.