So what would i do to upgrade to a new version or kernal?
To use Gslapt to upgrade to a new kernel, you would have to enable it to update and upgrade kernel packages. To do this, press Edit - Preferences, and then select the Excludes tab. Then remove all the kernel entries from the Excludes list, and you should be able to update and then upgrade your kernel.
I'm guessing that changing the sources via Edit - Preferences - Sources may allow you to upgrade the entire system from one release to the next, though it seems that doing this is not supported by the developers here (unlike either Debian or Ubuntu).