Since you don't have much in your home directory you could do a clean
install
and not worry about it. If think you may want to keep things in your
home directory
this would be a good time to make two partitions, one for root, and one
for home, swap
is pretty much automatic. You can do that with the live 10.10 CD, or a
GPARTED CD you
can create. I have found it is nice to have one of each on hand, they
are useful to look
at a disk and see how things are set up. If you do a clean new install
you still have the
choice of either formating or not formating the root partition. I think
it is a good idea on
a new install. Then you can reinstall things like Gimp if you wish
later, you will loose
Google Chrome on a new install but you can reload it after it is up and
running.