MMH5.5 - Heroes of Might and Magic 5.5

Good afternoon! I need help! After installing Heroes 5.5, the spellbook looks very distorted, stretched in width: (see attached screenshot)

(Clarification: screen resolution: 3440x1440. At the same time, in the regular Heroes 5, version 3.1, the spellbook looks normal on my screen. The problem is specifically with the 5.5 mod. Please tell me if there is a way to fix this?)