I use Magic remote. Click on sub>a list of subtitle appear>doubble click on one of the list>a new menu appear>down corner on the left, turn off subtitle
You must google 'smartshare' or download at this link(official link from lg) :
http://plex-downloads.s3.amazonaws.com/0.9.5.2/Plex-Media-Server-0.9.5.2.zip
Install this on your laptop.
Connect your tv and your pc at same router/modem wireless
On your TV>Home >smartshare
Done