Cheats Manager evidently doesn't have an option for that. The normal method is to right-click the game in your list, click Properties, and go to the AR Codes tab and click Add. That doesn't crash for me, so I guess it should be fine.
(1337th post!)
(1337th post!)
<@skid_au> fishing resort is still broken: http://i.imgur.com/dvPiQKg.png
<@neobrain> dafuq
<+JMC47> no dude, you're just holding the postcard upside down
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<@Lioncash> pauldachz in charge of shitposting :^)
<@neobrain> dafuq
<+JMC47> no dude, you're just holding the postcard upside down
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<@Lioncash> pauldachz in charge of shitposting :^)