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I'm having trouble here :( It seems you uploaded the wrong Solovey file. I downloaded it twice, and it doesn't work – none of the missions are available. When I use a different file (uploaded in the "addon discussion"), the new missions are available, and everything is fine. You probably took it from the wrong profile. You can check it yourself in the game – you definitely won't have access to the campaign missions in this profile.
So, I still need the correct campaign.sav file from the profile you used to complete all the addon campaigns. If anyone can, please upload it here.
P.S. I should probably start playing the third Disciples game, but I can't seem to finish Heroes because of these save file issues.