Although it can be done with a long straight screw driver  first couple are with a scope and the seat mounted.
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
I did find it easier if one bends a arc in the blade like below
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
	
		
			
		
		
	
or you can also hit the latch like below to actuate the release. Either way push down on the seat like with the key to take the load off the latch mechanism it will release much easier.