This is great, we just need a developer to produce a GUI utility that can do the same exact thing, only easier, and quicker. And it would also make it more user friendly for newbies. And even though I am certainly not a newbie to Linux, even I have to admit, I'd enjoy having a GUI method.
Ohhhhhh, of course! I knew that. But my brain is off right now.
I need some coffee to jumpstart it, where's my delicious dirty bean water? FrenchPress, where are you?
I did it via terminal and also tried ukuu. But, now have Mainline GUI, just in case.
Install the synaptic package manger. Old kernels will appear in the autoremove section as new one are installed.