Moving site from subdirectory, but still allow original access

Okay – just a quick one, which I’m sure is simple, but…..

The site is at https://www.kingspropertymanagement.com

I followed the instructions to the letter for “Using a pre-existing install” on this page https://codex.www.ads-software.com/Giving_WordPress_Its_Own_Directory

Fab. And it seems to work!

However, now when I go to the original address: https://www.kingspropertymanagement.com/NewRentals I get an Page Not Found error. I’m not sure how important that is, but it bugs me.

The index.php file is still in subdirectory, etc. So not sure what’s happening?

Thanks much for any help! I did tried searching the forums, but couldn’t find this exact problem!