from config.txt:

// Desktop for saving screenshots etc. Defaults to $HOME/Desktop
desktop_path

which works, screenshots are saved to the desktop.
but I tried
desktop path $HOME/Pictures =>** failed to save screenshot
desktop_path $HOME/Desktop =>** failed to save screenshot
well, $HOME is for linux anyway so I tried variations of
desktop_path %HOMEDRIVE%%HOMEPATH%\Pictures =>**failed to save screenshot
what's the correct path?

besides, when it works, pico-8 says "saved screenshot TO DESKTOP"!

Hi, I have the same problem so I came here to find a solution. Well...
I tried something simple like C:/Temp/ without luck.

That was working fine with the previous version of PICO8.

@Txori: explicit paths like C:/Temp work for me, as long as the path actually exists (pico-8 won't create it).

All right. Thanks @ultrabrite
I didn't create the folder. I'll use that while waiting for the correct method to export to the desktop.

Setting the directory after it exists works; just remember to exit PICO-8 before editing the config file, or it will overwrite it when you close it!