Hi Kevin, I'm unsure what the previous firmware version was. Please provide a link to all of them. Here's the screenshots you requested: As you can see it's not possible to create a manual profile...

Hey mate it's quite easy you need to restore firmware using tftp recovery mode. Here's a guide for you https://milankragujevic.com/restore-a-bricked-tp-link-router-with-tftp

I bought this device about six months ago and was running without issue. I was in the process of upgrading other TP-Link device firmwares so also upgraded my MR6400v2 from stock firmware to current....