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After clicking on Update, a message appeared saying that an update was needed. We agree. It should update something around 330 KB. But nothing was updated. A file appeared in the Heroes 3U folder, H3U.exe, if I'm not mistaken. And after clicking on it, the update process was completed.
In the list of templates, an empty line is initially displayed. If you click on the triangle to expand the list of templates and also leave the field empty, a crash occurs.