[BUG] I can't delete milestone

[Eldrinn-Elantey]

I use the latest version of the program

[DaleStan]

What mods are you using?

[Eldrinn-Elantey]

Specifically in this example, the Exotic Industries mod is used

[DaleStan]

I've fixed this in Yafc-CE#129. I expect it'll be in the next release of the community edition of YAFC. For now, if you temporarily change back to English names, that should also work.