During this step, you can select the address book data to be converted. You can either select the data by user or
choose to convert a special address book file, which is typically named with address.dat and is located in the user
For the target file, it could be a comma separated value file (*.csv) or a tab separated value file (*.tab). You may
also choose to append a existed file by checking the "Append Existed File" box. If the check box is not selected. The
program will create a new file.