Maybe the comparsion with a car was unfortunate, but I know you get my point. Don't get me wrong, I appreciate and admire your work, also you are Finnish and I Love Finland (Asian too), but you charge for this particular plugin 20€ for commercial license, is it lot of money or no this matter is to discuss, for me, 20€ it's lot since my payment is around 430€ netto (Damn that company). So I didn't know what to expect - just plug and play... I didn't predict it can has some issues, perhaps I'm dissapointed in myself, lack of JS knowledge and my frustration hit you ricochete. But at least you could put a warn it "may cause problems with other plugins using regions".
Now I'm stuck in dilema what to do now, buy license from you and turn off TSR_SideStairs plugin, re-design all maps, or keep project as is right now and keep using vertical and diagonal stairs or make (somehow) my own fix.
I'm not pushing on you,
@OcRam, just loud think.