Hey guys,
I still hold Kin ERC-20 tokens and don't know how to swap them.
Please advise
Why did you not swapped your KIN tokens earlier ? The swapping has some deadlines and you cannot swap your token lifetime.
Kin token are already moved to solana blockchain and i don't think that you can swap them now. They are worthless coins on your erc20 blockchain.
They were kind of worthless for a long time

But now they are rising for some reason and I want to trade them
They will never be worthless, this coin has a value and even if you did not swap it now, you can still swap it later. Maybe some holders just forget to track on it as its very cheap before the bull run.
you can read some information here.
https://medium.com/kinblog/kin-migration-details-for-token-holders-d834696bc2e6For those who hold their Kin on Ethereum and want to swap to Solana they will be able to do so through a Solana / Ethereum “Wormhole”.