Hi,
I need your help

I have an old version now of koreader and of the start menu, and I have some battery problems on both of my H2O.
I want to update everything to give it a chance to resolve my problems, so my questions are :
- How can I know the version of my start menu and of my koreader ?
- How to update koreader ? (I suppose I juste have to unzip the archive, except the tgz file ?)
- How to update the start menu ?
I know that it's not the right place for my last question, but if you have the answer.......
Thank you very much in advance for your answers...