Lost coins will offer reward if i can recover

I exchanged linden for lite coins on mt gox in 2013. I didn’t have a wallet to store them when they were downloaded to my laptop. now i think i found the file called lite coin-qt- dmg. when i try open it i get this message.
Afatal error occurred. lite coin can no longer continue sadly and will quit.
EXCEPTION. 11Db invalid argument lite coin in runaway exception

How can i open the file to see if its my coins?

“continue safely” not sadly