I want to notify that seems like something is not working well on the Substance 3D Painter Steam Version and the command line argument "--export-path".
If I try to execute Painter.exe only and use the --mesh argument Painter starts as we expect but if I add the "--export-path" argument Painter opens as a clean session without load the --mesh.
Other user mentioned that this is not happening on the normal version. If I execute the command only with the -mesh argument steam ask if it is ok to open Painter with that new argument but open the Painter session fine.
Hope you can find what is happening, thanks a lot.