Hi everyone how to get lost litecoins into newly installed desktop wallet?

Hi All, Last year in December i transferred my litecoins from coinpot to my desktop ltc wallet. Because of my lappy got some problem, i lost my desktop ltc wallet which was installed previously.

So after so many months i again downloaded LTC wallet into my lappy now i can’t find my amount of ltc anymore. I have checked in the transactions it shows nothing in the wallet.

So please can anyone help me out how to retrieve my litecoins into my desktop wallet again.