Don't you just have a back button up at the top next to where you put the web address site as part of your normal computer layout? Can't you just use that? I don't understand why no back button on here is a problem. I thought it was standard to have one as part of your tool bar?
I realise I'm probably dazzling you with my technical know how but I can't explain it any better ;0)
Mine worked tonight on first try then it gave up the ghost, must admit I got excited when it worked, sadly deflated now, before anyone comnments, I will, how sad!!