AngryTapok1337
Auto-translated
Welcome to Heroes 5: as soon as the editor index is rewritten (e.g., a map is opened in the editor), it completely forgets about your scenes, and you won't be able to open them again without performing some complicated procedures.
Thanks for the explanation regarding the index. But Tapochek isn't stupid; it turns out Tapochek saved the index in a new folder).
Everything works now, by the way).