Hello, thank you for your donation. You didn’t bought RetroBat, you give a free price. Full 5.1.1 setup is kind of a reward for those how donate to the project. For issue, if you need support it could be better to go on our forum or on our Discord. First thing, make sure your computer meets the minimum requirements and you followed the setup instructions. Make sure you have DirectX and the VC++ Redistributable installed.