Is it possible to screenshot the game’s desktop window (instead of the HMD view) using highresshot ?

When playing without a VR headset, the command highresshot can be used to capture the game’s window at any desired resolution. Is this still possible while using a VR headset?

For context, I have an in game camera that outputs a 2d render target onto the pc spectator screen, and I’d like to be able to save that texture to the pc. I was really hoping to utilize the ‘export render target’ node but this only saves to an unrecognisable file or a very transparent png, considering there is no way to set the alpha to 1 upon export. I really hope I can get this camera system working, it would be great for players to be able to save and view their game screenshots. Any help is much appreciated !