Hello luanviegasbottcher ,
(1) installing path of plugin is like this:
C:\NXP Semiconductors\PN7462AUPspPackageFull-v04_05_00\PN7462AU Software\IAR
(2) contents in the path are like following:

(3) about packages, see attachment
It seemed that your plugin is not complete, you can re-install it.
Best Regards,
Weidong