This was the last version released under the Gibson Guitar corporation before the company went bankrupt. It introduced a cleaner UI and better multi-touch support.
SONAR X1 through Platinum relies on deprecated DirectDraw surfaces. If the UI is black or flickering, download "DXVK" (DirectX to Vulkan wrapper) and copy the d3d9.dll into the Cakewalk executable folder. cakewalk old versions download top
If you are searching for a list, these are the most requested builds: This was the last version released under the