I have checked your site and it looks like the composer editor is loading up fine for me as you can see from my screen shot here, http://screencast.com/t/PZDc6g8f3Q
Hi! Ah. Now I understand. When creating a new blog then the "add block" appears. The old ones (imported from old site and previous version of EasyBlog) probably don't support blocks...
As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.