Be sure to backup your database before making any changes. You have to go into the rule_values table of your database and change Character:MaxExpLevel and Character:MaxLevel to the desired max level or you can use the following sql to do it for you. 
 
update rule_values set rule_value = 85 where rule_name = 'Character:MaxLevel'; 
update rule_values set rule_value = 85 where rule_name = 'Character:MaxExpLevel'; 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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