I found out a lot of upgrade instructions. I read https://www.ads-software.com/support/topic.php?id=21984 but I took fright of installation of WP 072 and WP 1.0.2. There is no other way to upgrade b2 directly to WP 1.2.2?
I followed this: https://wiki.www.ads-software.com/?pagename=wp-admin/import-b2.php. I am afraid I left mistake out.
