Quadency DEX has been discontinued however, you can still withdraw your liquidity in Sushiswap. - July 2022
Liquidity withdraws are done directly from SUSHISWAP only. Find steps here on how to withdraw your liquidity.
Make sure to have your web3 connected to tag along.
Go to the Sushiswap, select Pool, and click on Browse
The interface will display all your positions in Liquidity Pool
Select which position you wish to withdraw from
The first time you are withdrawing from a pool you will be requested to Approve the transaction via your web3 wallet
Once approved, click Remove to withdraw your liquidity to your web3 wallet.