Madali lang yan, kunin mo private key ng wallet.dat mo, since litecoin core yan tingin ko pwedeng kunin ang private key nyan, then hanap ka ng light wallet ng litecoin at doon mo import ang private key.  Magkakaroon ka ng access dyan address na yan once na maexport mo na ung private key.
sundan mo lang ang sinasabi dito para sa pagextract ng private key.
https://www.reddit.com/r/litecoin/comments/7d90f5/litecoin_core_wallet_seed_and_private_key/

then download mo itong light litecoin wallet from electrum

https://electrum-ltc.org/

tapos iimport mo na ang private key dyan, hanapin mo n lang  sa youtube kung paano magimport ng private key.