How are you attempting to upload Path Finder files? Via Drag
& Drop or the hotkey? I would think Drag & Drop would work
w/ Path Finder but I'm not surprised that the hotkey isn't working.
To directly support hotkey uploading from Path Finder, they'd need
to expose their services via AppleScript or another method. I'm not
seeing any documentation about that on their website. So currently
it looks like it's not technically possible. Drag and drop should