If you have multiple VCF files and you are looking for the best tool, then i can highly suggest this TrustVare Contacts Manager Software. This tool is ideal for effortlessly converting files without losing any contact information. Users can easily import vCard (.vcf) files into Lotus Notes NSF format.  The best part of this software is that it can maintain all of your contacts important details, such as names, phone numbers, and email addresses, and allows you to convert multiple files at once.  The interface is straightforward and easy to use, so you don't need to know anything about technology to use it. It also works with all the main versions of Lotus Notes and vCard files.  You can also get a free trial version, which lets you experience the product before you buy it.  It's a secure and reliable approach to managing and changing VCF contacts.