How can I get System Mechanic to finish de fragmenting the registry?

System Mechanic starts de fragmenting the registry when I start my computer. However, after the countdown completes it doesn't do anything, windows boots up normally. It used to work, and for some reason it just won't work anymore. Does anyone have any ideas for how I can get System Mechanic to finish de fragmenting my registry?

I don't think defragmenting the registry is something anyone really needs to bother with. I'd be naturally suspicious of any programs that claim to do that.