One you update, make sure to purge your server cache and clear your browser cache as well before testing your site again.
Yes, the Template Block was changed into one single workflow when the Template Manager was released. See https://theme.co/apex/forum/t/template-manager/20364. If you were looking for the old page and block designs though, regretfully, they were phased out in favor of the new templating system. Right now, there are new designs in the starter pack you can download to your site right within the Template Manager.
I would also recommend that you check out our News section from time to time because discussion of new features and future updates are posted in there. Also check out the new tutorials in our Knowledge Base.