"Spitfire Dawn" campaign

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so i wanted to install this campaign but I seem to be having trouble... i manually installed the file to the User/Documents/1c Softclub/IL-2 Sturmovik Cliffs of Dover/mission/campaign route but when i start it up, it isnt there...

I also tried using the installer but im not sure im using it right.... under the campaign path I use the path i have ^above but im not sure what i need to the Steam path.