We also had the same concerns from a Safeguarding viewpoint, however, you can keep all your policies website blocking and categories in the policy and just change the one drop down for "Log and Block application execution:" to "Off". My understanding is this just stops windows app logging and blocking, but not website logging and blocking. Basically, anything below the "Log and Block Website Activity:" will still be operational in the policy. That was my understanding with my call with them.