The best way to move all your data etc is through: Backup & Restore.
Follow these steps:
On the old device:
1./ Create a backup: Menu ->Backup
2./ Deactivate the license on this device: Menu ->Help ->License
3./ Find the .ZIP backup file and move it to your new device (USB)
The default backup location is …\Documents\eM Client)
On your new device:
1./ Install eMC (www.emclient.com/dist/latest/setup.msi)
2./Move the ZIP backup file to: …\Documents\eM Client (create the folder if it is not there)
3./ Skip initial setup
4./ Restore from your backup through Menu ->File ->Restore
5./ Activate your license in Menu ->Help ->License
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