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.
4.1.6 revamps the message shown after a game update to avoid confusion, adds an option to disable content integrity checks, and fixes a translation API issue.
Requires Stardew Valley 1.6.10 or later on Linux/macOS/Windows or Steam Deck.