Wetforce blade change

How do you take the nut off that's holding the blade in place without the blade turning? I've lost the manual and don't see how to do it so I can change blades. Thanks for any help.
7" blade.

Visegrips maybe? Don't bend the blade.

That's it! Use pliers or Vise Grips and latch onto the blade in a location that will let you bind the pliers against the guard or frame or something solid as you tug on the wrench. If you're careful you won't bend the blade.

I am not familiar with Wetforce, or do you mean Workforce, that used to be sold at HD? I think it has a button somewhere around the blade guard that locks the blade in place

Thanks for the info. The button is underneath. Turn blade till it locks. You saved me from the rath of the job Foreman (wife). Ha ha. Thanks again for posting