how do you import the em contact list to a new computer, but still using the same em email?

The easiest way to move to a new computer is to backup on one (Menu > File > Backup) then copy the zip file to the other and restore (Menu > File > Restore).

You will also need to deactivate your license (Menu > Help > License) on the one before you activate it on the other.

If you just want to copy the contacts, choose Menu > File > Export > Export contacts to vcf file. On the other you can use Menu > File > Import > Contacts as vCard.