Shorting random pins will just kill it. The strobe is controlled by code inside the black chip with 8 legs. You would need the original source code, programming skills, programming software, and programming hardware, and a programming ISP clamp.
You are better off asking for recommendations on a flashlight you would like.
Might be. One thing is for sure “Shorting random pins” is definitely bad idea.
And because both this flashlights look to be e-switch controlled, it’s not that easy to “fix”
them to ON/OFF UI by replacing the driver, I haven’t seen ON/OFF/no modes e-switch driver/firmware yet,
it would be a 5-minute job for ToyKeeper but for average Joe … easier to find new light.
If you turn on the light and try loosening the tailcap until it turns off then tightning it again, does the light turn itself back on? If it does you could use it like a twisty light and never touch the switch.