When launching CUBE 6.5.1 or OpenPaths CUBE, a MS Windows message dialog might pop up as shown below :

•  Go into Windows Settings,   Gaming > Game Bar. Then turn off game bar settings

If the dialog still appears:

• Check if the Game Bar app is installed on your machine. You can do this by searching for 'Game Bar' on Windows search. If Game Bar is not installed, install from Game Bar - Microsoft Apps and re-try turning off game bar settings from the above step.

In the case that this does not resolve issue manual update of registries is needed. For this: 

1. Open Registry Editor in machine
2.  Set the following registries to 0
   1. AutoGameModeEnabled
      • If value is not available add it under the following location: Computer\HKEY_CURRENT_USER\Software\Microsoft\GameBar and set it to 0
   2. AppCaptureEnabled
      • If value is not available add it under the following location: Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\GameDVR and set it to 0