Hi,
could you, please, share the link to Opera 35?
http://get.opera.com/ftp/pub/opera/desktop/35.0.2066.92/win/Opera_35.0.2066.92_Setup.exe
Note that unless if you block auto-update, Opera will (auto)update itself to latest stable version. Also note that if you manage to keep Opera on version 35 you will (may) be missing (several) security updates and bug fixes.