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Still intersted in theme developer response, but I resolved the issue using this tip:

Link to post: http://ww.wp.xz.cn/support/topic/full-posts-on-main-page?replies=12
Thats the beauty of the theme. It uses the WordPress automatic excerpt by default. Unfortunatly it supports only the excerpts.

http://codex.ww.wp.xz.cn/Function_Reference/the_excerpt
http://codex.ww.wp.xz.cn/Excerpt

You can try to swap the excerpt() with the content(). Open the content-*.php and replace this code:

[ Moderator Note: Please post code or markup snippets between backticks or use the code button. ]

<div class=”entry-summary”>
<?php the_excerpt(); ?>
</div>

with this:

<div class=”entry-content”>
<?php the_content(); ?>
</div>

Remember that the theme is not supporting the “full format” on the the blog main page. So with changing the code you maybe have to deal with additional issues, like formatting or images of the “full format”.