Are there any changes in platforms supported by the 2.0 version?
Not really. As the tool is written entirely in Java, it considered as platform independent and it should run anywhere where Java is supported. If you see any failure which is obviously caused by incompatibility with the underlying platform, report a bug. The 2.0 version will be actually better compatible with mobile platforms thanks to implementation of the RFB listen mode and more intensive testing. We for example resolved an issue with PocketVNC and made our product suitable for testing of Windows mobile applications. Platform support is documented in the Release Notes document.