This release of Loom has a number of enhancements and bug fixes: Added K30 CO2 Sensor is a new type of Sensor called Serial/UART Sensor: Can be found in (#92) and (#97) Added a new Internet Platform, LTE/4G: Can be found in (#40) Remove SleepyDog and Nap function so that able to use FeatherFault: Can be found in (#95) Added new example code for K30 and LTE: K30 and LTE example codes can be found here Added a new Board Manager so that the process of installing Loom is easier: Can be found in (#51) and documentation here Made a new Doxygen that users can read the documentation easier than before while having the old Doxygen version: Can be found (#30) and (#22) I would recommend that all users, who even already install Loom before, need to do a fresh install rather than upgrading Loom. You also want to delete Arduino and reinstall as the tutorial is given above link, but it is not necessary to remove Arduino. If you need help, you can either reference the photos below(only for windows) or send a GitHub Issue of how to remove Loom. When you press Window + R, you will get this Run application. Then enter %localappdata%. Look at 1.PNG In Local, you will see the Arduino15 folder 2.PNG. Delete that folder. Then go to Documents and delete Arduino as how it looks in 3.PNG Once you complete, reinstall both Arduino and Loom from the Guide above or here