Have you tried just bending it out a bit? I often do this with my CS folders. While still attached to the knife, I loop a string or paracord under the clip and I pull up. Then I check the clip tension. If it's the same, I pull up a bit further on the paracord. Check and repeat. Worst case, you loosen it too much and you need to take off the clip to bend back a bit. I've never broken a clip like this or damaged the knife and I've done it dozens of times.
I don't have a 4-Max so I can't comment on that specific clip.