The Legend of the Knight ........... slows down (King's Bounty: The Legend)

So I bought the Kings Bounty anthology on sale, not only for the collection, but I decided to go through it again starting from the first part and here on you, 20 fps, at any settings (although it’s probably not in the settings), if you open the inventory and select an item 7 fps, I'm not immediately talking about the components, infa weaving, firstly, the same Steam version KB: DS, which is the last game in the series, is going great, and secondly, on the same sale I bought last year's batman, in it at high 40 fac, Well, thirdly, the pirate of this very legend about the knight goes without problems, I played it on the same system, but deleted it for a long time.
In short, someone knows what can be done (set compatibility, nifiga), maybe something needs to be registered in the files or in the label