We've had this issue before and didn't get it sorted. I've started a new thread because the old one turned into something else.
Ok so from the start, I'll call this step 1 for reference. Website was all working, including the blog which I fixed yesterday.
I ran the update and got this error again. http://postimg.org/image/wv1s8y4nf/
Which closes the store and also breaks the blog again giving me this error on my store again. http://postimg.org/image/okijn199d/
If I delete that topmenu_dropdown_top_menu.post.tpl file and the blog works again (showing 404 at the moment just because I haven't linked the page id but is working).
If I run the update again, the blog breaks again and the update doesn't finish and we go back to step 1.
FYI. We have a theme called BuyShop. There are TWO blog folders,
I cannot get past - any help appreciated. Bane of me life at the moment this....