I've been trying to install the core version to see if I want to purchase the paid version but the install keeps failing and I get the error below

Warning: require_once(__DIR__/autoloader/autoloader.php) [function.require-once]: failed to open stream: No such file or directory in /home/content/a/m/d/amdsupplies/html/tooth/tmp/install_542df066b582a/libraries/compojoom/libraries/compojoom/include.php on line 18

Fatal error: require_once() [function.require]: Failed opening required '__DIR__/autoloader/autoloader.php' (include_path='.:/usr/local/php5/lib/php') in /home/content/a/m/d/amdsupplies/html/tooth/tmp/install_542df066b582a/libraries/compojoom/libraries/compojoom/include.php on line 18