OK, here is my new dilemma.
Following on from my navigation not showing up on the homepage, I have decided to upgrade to the v5.2.8. Upgrade was a complete success, although the navigation is still not showing but this is not the main problem. In Admin > Store Settings, all the options now have double ticks/crosses. For example on the Features tab, the Enable Products Review/Comments now has Tick Tick instead of just 1 Tick. The same is for items which are disabled I now have Cross Cross.
Furthermore, I do not have the option to change them; although the hover says "Enable" or "Disable", clicking the tick/cross does not do anything. Is my upgrade bugged or does anyone else have this problem?
Thanks
Dave