Dreinakh

The author in the new version very strongly reworked engine parts. Therefore, he decided to softly stop supporting old parts - they are available on flying crafts and saved builds, but are not available in the builder list. They can be returned through the modification of * .cfg files or the installation of an earlier version of the mod.

Now I understand. Thank you for such a quick and accurate answer

@Nertea I used new parts from a freshly installed mod. Archive downloaded from Github. Game version 1.9.1 from Steam.

Where should I put the "NearFutureMethalox" folder? Standard location in "Gamedata" does not work for new version :(