Follow the instructions at the following link -  https://www.peerplays.com/wp-content/uploads/2017/11/Howto-Claim-Your-PPY-Tokens.pdf

If I interpreted correctly, you are asking how to convert your tokens from the first crowdsale.  If so, follow #2.

It should also be noted, that if you intend on sending them anywhere at any point, YOU WILL have to create a new account after you claim and send your coins from the 'bts-' account to the Peerplays account.  You will lose your coins if you do not complete this step.  So create the first account to claim. Second account for sending.