The changes in the 7.460 software have only been released for the following units so far:
1159ci HD, 1159ci HD Si, 1159ci HD XD, 1199ci HD Si
959ci HD, 959ci HD DI, 959ci HD XD, 999ci HD Si
859ci HD, 859ci HD DI, 859ci HD XD, 899ci HD Si

Some of the other model units will receive it at a later date so be sure to check your My Humminbird account periodically.