Click the Log In or Register button in the upper-middle part of the Vortex main screen.It can install SMAPI, keep it updated, and simplify installing/updating mods. A window should appear that says something like 'A new version of SMAPI is available.' Click the Install button and follow the on-screen instructions.In the top-right corner, click Install SMAPI or Update Available.ModDrop is a mod manager which supports SMAPI. ¹ To install manually instead, see instructions in the installer's readme.
zip file somewhere (but not in your game folder!). Install Option A: use SMAPI's installer See also unofficial video guide.