need Windows 4K Camera Recording App – adding features

Current App version is 1.5 (basic)
Need to finalize 2.0 with missing features.
Actual v1.5 (source code provided)
and what needs to be implemented in V2.0 (.

Summary: Built Windows App first, Mac OS after

Seeking for a Software Dev. with a C# , Image Processing and Direct Show experience to:

MUST use the existing code to integrate the additional features to achieve a successful v2.0.
Must utilize existing UI design

implement mapping of LicenseSpring code for license management