Hello,
1) I need your link to check what you wanted to remove.
2) Please edit file /wp-content/themes/wp_hot_explorer/main.php and edit this line:
3) You can edit file /wp-content/themes/wp_hot_explorer/content.php and change max width/height value that’s 275 by default.
Code:
the_post_thumbnail( array(275,275) );
Regards
Milos