yes, you need to uninstall "enhanced kernel for power users" before you can see the latest version on the app manager list.

you can also download it using x-terminal:

1. download "rootsh" from app manager. the program allows you to become 'root', or 'super-user-do' in you filesystem

2. open xterm

3. type in the command prompt

sudo gainroot

apt-get install kernel-power

reboot