You can download the latest builds and find more details on the official BlueStacks Download Page . BlueStacks 5.9 Release Notes
When running multiple instances via the Instance Manager, ensure your computer has enough remaining threads. If your CPU has 6 cores, running three instances at 2 cores each will max out your system. Lower the CPU allocation of each individual instance to 1 or 2 cores maximum to maintain overall OS stability. bluestacks 5.9.620
Set to High (4 Cores) if your system allows. You can download the latest builds and find