fheroes 2 - Can't access campaign

I have problem with mod fheroes 2 v. 1.1.15. Button for single player campaign is not available. Also for standard game I have much lower number of scenarios than in original HoMM 2 (for 2 players hot seat I have only one scenario "4 Dimensions" for example). Is it normal or something is not right? I have HoMM 2 Gold from GOG.

https://preview.redd.it/txrxgu9eiiyg1.png?width=1919&format=png&auto=webp&s=5b68bd6939b003eacbf0412ad4dd0663ad0b8798