There is a button on the MACH screen to turn it off. The Tip Saver is pretty useful in normal cutting. It's not just about cutting over a void or off of the edge. The tendency of a THC to dive as the cut comes around close to the lead-in is an aggravating problem that the the TIP saver resolves. Even the natural tendency of the motion to slow down on tight turns can cause a normal THC to dive into the work. I have always cut thinner material (even 14ga will pop when you cut close to the edge from stress relief) with the edges clamped to the grid. i just use some of the cheap metal spring clamps. I always cut with a 1" "gripper" space.
I can see about writing a macro to turn the Tip saver ON/Off in g-code and you can insert it in SheetCAM as a code snip. I would suggest leaving the setting at no more than 5% and enable or disable the Tip Saver in areas (like the edges) if you don't want to use clamps.
Maybe we need to add a TIP SAVER DELAY function in the Cut Profiles that will cause the Head lock to be delayed (and give the DTHC time to lower the torch. Only problem is that on a normal cut where the gap is a lot smaller ANY delay would probably result in the tip banging down on the metal at the end of a cut. We already have a "Fault Delay" that lets the DTHC ignore the big voltage spikes during and right after a pierce event.
You know how to get in touch with me (:-)