Anyway, the problem occurred when I tried going to back to an older version, it successfully installed the older version without a hitch but the problem is that the home screen UI crashes every time I press the home button. I can do everything else on my phone, I can pull down the notification pane and gain access to all the tiles there and if I get a facebook notification for example, I can load up facebook but as soon as I press the home button I get a message saying 'Unfortunately, Trebuchet has stopped.'
I know there are always problems when reverting back to a previous version but I was wondering if there would be an easy way to fix this without having to factory reset my phone.
EDIT - I just updated back to the latest version and the home screen UI is back but I don't really want to be on this version as it is laggy so if there's a way to use an older version without the home screen error then I'm all ears.
As you can see with the screenshot, I have the settings open which I opened through the tiles pane but trying to press the home button will result in that message popping up every time.