If the Superflash switch is like the Rack Blinky 5 it may be difficult to modify. That soft touch switch is finicky. So far mine has stayed in the mode I've chosen, but I usually have to cycle through the steady/blink/off options a couple of times because it's too touch-sensitive.

I doubt the soft touch switch can be modified, but it may be possible to replace with another switch if you're handy with a soldering iron.