**⚡First release of iCUE SDK v4.x**
Key differences from SDK v3:
- Unified API: all functions return error code
- Memory management: SDK v4 fills the memory preallocated and provided by client app
- Instead of device indices SDK v4 operates with unique device identifiers
- SDK v4 offline mode: client app will be notified when connection to iCUE has been established or lost
- SDK v4 exclusive key event listening: client app may intercept G/M key press events when it is allowed in iCUE settings