Instructions unclear, ship stuck in blender.
On a more serious note: this can be simplified a bit further by not requiring users to go to their folder, but including that in the command. So it'd be " launch powershell, paste in the following: cd '~\Saved Games\Frontier Developments\Elite Dangerous' | cat * | sc Journal.101026191221.02.log ". Perhaps redirect the output to the user's Desktop folder, so they don't need to go after the file.
@ ErichZann: your journal files contain nearly everything, even your in-game chat history: the messages you've sent to, and received from, other Commanders.
Elite Galaxy Online has an option where you can view and delete the logs you've uploaded, so you can delete them after the object scans were processed from them. (At which point the files are no longer needed.) As far as I'm aware, EDSM doesn't have a feature like this yet. Which is why I'd recommend using EDDiscovery if you wish to upload scans there, so only the scans get send to EDDN. (Also, since it's open source, you can check that it really does send the scan events only.)