Importing Contacts - Possible to update existing records?

Importing Contacts - Possible to update existing records?

Hello,

I'm evaluating Zoho CRM and investigating the feasibility of importing contact data into the system on a daily basis.  I noticed that it appears that the only option for handling duplicate records in the free version is to clone them.  I was curious if there is any mechanism (in the free or enterprise version) to support importing data on a daily basis and updating existing records on import as opposed to just overwriting/cloning them?

Thanks,

Eric