[x2495iiii]

I've done something similar already. When an element of my Alice worlds generated an error which prevented the world from opening, I eventually had to extract the files from the Alice world (coincidentally, I used 7-Zip) and look through the folders representing the extracted objects in the world to find the element then delete the flawed object.

I never gave this any thought, but I suppose it might be possible to REPLACE corrupt elements in an Alice world with nearly identical but untainted elements by deleting the bad one, inserting the good one, then rezipping the changed world.

I'll try it...eventually.