This AVG thing is merely a rebranded version of TuneUp Utilities 2013, which they purchased, put their name on it and ask you to pay yearly “subscription” – same as with their antivirus.
I purchased TuneUP Utilities ages ago (one time payment, as it used to be with NORMAL software long time ago) and it still works flawlessly. Having taken over the database of their old customers, AVG used to nag me to buy “new, improved version”, which is essentialy the same as 2013 version of TuneUp and then keep paying for it year after year all over again.
Sorry, no deal. Ever with a “free” version from here.