The version is the same but the build changes. Last update was from 0.69.0(311) to 0.69.0(312). We have a new release every Monday

US users are restricted due to regulations but USD as a currency is already available

Check out the API wrappers the community is building. We are listing them here https://peachbitcoin.com/peach-for-businesses/ Right now we have typescript, .NET and Python. They make very easy to automate your trading workflow or to integrate Peach in your current application.