Hi - I pause the torrent immediately after it registers (while it's still searching for peers but file list is available) + then go and do 'Don't download' on the files I don't want (at this point 0% downloaded) - and then go and start the torrent again from uTorrent. This problem has happened on every torrent I've tried to do this with since getting the new update (noticed it maybe 5 times) - so it's definitely not specific to a particular torrent.
It's definitely only being happening with latest uTorrent build 43580 x32 (running on Windows 10 64 bit) - I do this quite often for packs where I need to only grab some files - never remember it not working before now.
The torrent site is private so I can't post the link here.