To add a new memory without pasting, use "create" top right of plugin window, choose whether memory, token or whatever, and then where it shows up, change the memory type using the drop down to whatever you want it to be. Then set, Owner, subject, etc. Be careful, there are both good and bad memories for many so make sure you get the one you want.
Are you talking about when you select family ties to left and right? Can you add ties there? If you do, and then tick the family box in the relationship panel of the SDSC, setting the type of relationship there, then your additions should automatically show in the in game family tree.
Or have I missed what you are saying?