Hello @NicoleB3030 ,
In our system, you can simply re-import the emails and have new information in the other column types. Our system will look for unique emails (contacts) already uploaded, and will simply update the other associated information if there's something new (e.g. first name, last name, street address, company name, etc.) This way you can still maintain the lists these contacts are in, without having to separately export and re-import them all.