I used to have the same problem too. But I found out that I only downloaded the 3.8 updates without downloading the separate Main files. Maybe you did the same? Just download the main files, follow the same instructions on the first page, and replace the files with the ones from the 3.8 update. Hope this is clear enough for people to understand. I apologise if it sounds messy or fragmented.
あなたを犯人です - 洗脳探偵;
You're going to be the criminal - Brainwashing-Detective