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Well, could you please provide a link to the page where you downloaded it from, in a private message? Or at least copy and paste the description from there? Do you really have the same image on the main game screen as I attached to the message above?
Because what you mentioned in your message is definitely not a feature of the original game, even with an HD mod:
"the unique abilities of creatures have changed, for example, minotaurs used to have the ability to block attacks, and ranged creatures had abilities like 1/2 or full damage in melee combat."
Ultimately, if you can't provide enough information, I can suggest the "Complete Collection" repack that I've had for 10 years and that best matches the original, except it doesn't require a disc. You can install the HD mod on it yourself. Just before deleting your version, transfer your saves and (possibly) added maps somewhere if you want to keep them.