Moving a Database
If you have two copies of MemberTies running and you want to copy the database from one installation to another, you should simply create a backup of the database, take that file to the second computer, create a new database, log in, and restore the backup to it.
This will allow you to create an exact copy of the database.
Note that if you have photos and other files tied to various records, you will need to copy the appropriate folders to the identical locations on the new computer. (Unless you use the File and Photo Storage preference to store these within the database, in which case this is not an issue.)
See Backing Up the Database and Restoring a Backup for details.