CCleaner free v5.15.5513 64-bit

I had to uninstall the above (installed two days ago) as it seemed to be slowing down my upgraded Win10 NIS/IE PC.

I checked my new PC earlier today - I thought it might have be IE at fault but I've just realised that this new CCleaner is the cause. It comes with "Enable Active Monitoring" pre-checked and I can't uncheck it:

CCleaner new versionauto checks active monitoring 2016-03 13th.PNGAny suggestions please to uncheck it? Or should I roll-back to the previous version?