Something wrong with the client(addons)

Hi I got the 3.3.5 client from this site and something weird is going on with it. I played fine for a few days Installed my favorite addons configured them and all was fine. Today after a game restart all my settings reset. It was like I was launching the game for the first time. The intro played wrong resolution etc. But also all my addons got reset. I Checked the WTF folder and all the settings are there but the client completely ignores them. Anyone knows what might cause this?

it is weird.
Btw to not let that happen again, do this:
1) Restart your PC
2) close your Torrent client and move your WoW folder away from your Torrent's download destination
3) now right click on WoW folder> Properties> remove "read-only"

ty for reply I moved the game from the torrent folder but the read only was already removed. I configured everything again and backed up my WTF folder hopefully it's not going to happen again. :)