A mod for the game Dyson Sphere Program that makes solar sails last forever.
Only solar sails launched after the mod is installed will be set to eternal.
R2modman is a lightweight mod manager that works for Dyson Sphere Program.
Install it, select Dyson Sphere, and search for this mod.
EternalSolarSails.dll into steamapps/common/Dyson Sphere Program/BepInEx/plugins1.0.0 Initial Release