If you have access to the program installed on the old computer, you can use the File > Backup command to save the program settings and then use the File > Restore command to load the settings.
If you have access to the files on the old computer but not to the program, you can copy them manually according to the instruction at http://www.weblogexpert.com/faq.htm#q1_4
If you have access to the files on the old computer but not to the program, you can copy them manually according to the instruction at http://www.weblogexpert.com/faq.htm#q1_4