I had an older copy of lxde on /dev/sda8 and installed a new copy from liveHDD
When installing I did not let the partition be formatted, and I forgot to delete 'everything on the partition first.

The install seems to have gone fine, except when I started up Firefox to connect to Forum I got a bit surprised that I had 6 tabs open from previous Forum topics?
My question is how clean is this install now? Would I be better off do it all over again to be sure that this really is new copy??
The previous version may not have been updated, I don't remember. I never kept a record of install steps but not much would have been installed to customise the system..