“detalife engine” cmc has problem with new version of php5 , i need to downgrade it , please tell me how. as i know my current version is 5.5

i have that problem on my site: i think it’s caused php5 version

(Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/classes/templates.class.php on line 68 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/classes/templates.class.php on line 72 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/classes/rss.class.php on line 51 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/classes/templates.class.php on line 68 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/modules/show.short.php on line 164 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/classes/templates.class.php on line 77 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/html/engine/classes/templates.class.php on line 167)