It depends on the operating system of the computer you are using.
Windows OS: C:/%appdata%/Susan
Mac OS X: /Library/Application Support/Susan
Into this location all database files, licenses and logs will be stored.
Yes, it is. Just copy the database file to another drive or memory stick.
AAAA-AAAA-AAAA-AAAA-AAAA - your license code