This is not as simple for me. I have not installed any real file manager on my current Linux system because i like more to use the terminal for file management.
Thankfully there’s the download version of Pixelorama (which Can load .pxo files from the “Load” dialog. hopefully this feature will be in the web version soon). This download version is for me a very good way to use Pixelorama right now because I am using it somewhat often.