Here is an installation guide for Solasta campaigns.
Exit Solasta if it’s running.
Subscribe to the campaign in the Solasta Steam Workshop.
Restart Solasta.
Click New Adventure, Change Campaign, scroll down and select the campaign.
Choose a party and click start.
UPDATES: when an updated version of the campaign is published and you load a save game, you’ll have the option to load “from disk” or “from save”. Choose “from disk” to get the latest version of the campaign from Steam.
Extract the zip file to
C:\User\%USERNAME%\AppData\LocalLow\Tactical Adventures\Solasta\UserContent\Campaigns
WARNING: do not put this in your Locations folder as you would previously. There’s a new folder called Campaigns.
Installing this way does not auto-update like Steam does so be sure to check back for updates.
To play, see the instructions above.