CMI converting from essentials
If you are transferring from essentials to CMI you can use dedicated command to import players information from essentials to CMI. Essentials plugin is not needed for it to work.
/cmi importfrom essentials [home/warp/nick/logoutlocation/money/mail]
home - will import home locations
nick - will import players nick name
logoutlocation - will import players last logout location
money - will imports player money balance
mail - will import players mail
warp - will import warp points
you can use more than one variable at a time, or even all of them, in example: /cmi importfrom essentials home warp nick logoutlocation money mail
This process can take some time. in general its converting 200 users in one second and you will get feedback message informing about process.
If you want to use old worth.yml file, then simply copy/paste it into CMI folder from Essentials and you are good to go.