This version was released to fix the Security Header problem that appeared when users would switch to LIVE mode. 
 
Simply changed the urls to the API in the live wsdl document to point to https://api-3t.paypal.com/2.0/ and https://api-aa-3t.paypal.com/2.0/ 
 
Before now, the ones in live were pointing to the same one in the sandbox environment and this caused a security header error to come up when users switched to live mode.

The new version still supports the TransactionSearch and GetTransactionDetails operations. The previous versions only supported 4 methods namely: DoDirectPayment, SetExpressCheckout, GetExpressCheckoutDetails and DoExpressCheckoutPayment. 
 
So phpPaypalPro now supports 6 operations available from the Paypal Website Payments Pro SOAP API.