I want to renew my regcure account with a check.
How do I use aq check?

William,
There is so much wonderful free software out there, why would you pay for utility software, what does it do for you?
I recommend Ccleaner: http://www.piriform.com/ccleaner

I just did a little research on Regcure and Paretologic, I would avoid them if I were you.