I tried and could not repeat this problem you have and I mostly played with visual only damage recently.
@crowtrobot
I noticed some strange behaviour when assigning liveries on the Z4 GT3. I selected a bunch of folders which worked in the previous version, assigned them and checked them in the game. One livery was missing and showed the white texture. The missing livery was the one from the folder called "Nextraline". The strange thing is, that the tool only assigned the whell_spec, wheel_blur ect. files, the livery files itself where missing in the texture folder.
Then I did a reset, renamed the folder to "Nextraline #88", assigned all the files again and this time it worked. Don't know why this happend.
One more thing for general understanding how this tool works. When we do a reset of liveries on a car previously added with additional liveries, are the added textures deleted from the folder or are only the RCF files edited so that only the original liveries show up in the game? I noticed, after renaming the "Nextraline" folder to "Nextraline #88", both showed up in the texture folder. Is this normal?