I recently upgraded an old router to a tp-link AX3000 Pro.  I believe when I installed it, it asked if I wanted to install it with 2.4GHz or 5GHz.  I chose the 5GHz setting.  Unfortunately, it looks like that was a bad decision, as some of my devices (printer, smart bulb) seem only able to work on a 2.4GHz network.  The speed of a 2.4GHz network should be more than sufficient for my needs and I was wondering what would be the easiest way to get to convert to a 2.4GHz setup.  I'm hoping I don't have to uninstall and then reinstall from scratch.

Any help greatly appreciated.

Thanks in advance.

Stew