See the SMAPI website for recommended download sources.
See the SMAPI 4.1 release highlights for the main changes.
SMAPI 4.1 mainly updates for Stardew Valley 1.6.9 and adds game file validation, home path anonymization, translation subfolders and gender-switching, scroll wheel suppression, and more.
4.1.5 mainly fixes translation issues in some mods with SMAPI 4.1, and updates the mod compatibility list for Stardew Valley 1.6.9.
Requires Stardew Valley 1.6.10 or later on Linux/macOS/Windows or Steam Deck.