Unable to change default layer

AX 2012 R3 instance opens in the usr layer, and I was trying to change this in the ax configuration. I created a new configuration and change AOT layer to Cus under the developer tab. I restarted the ax service and opened the client. The instance still shows usr layer instead of cus. Any Idea what I might be doing wrong?

This is a standalone instance accessed by logging into a aos server, which we just use for builds.

Have you entered the correct license code ?

You mean the developer license code in the developer tab?