To locate ISL Light Client log files on your Windows operating system perform the following.

Step 1

Navigate to ISL Online's current working directory. You can find it at the following path:
C:\Users\username\AppData\Local\ISL Online Cache\

Note: If you can't find the AppData folder, you can enter %appdata% into the navigation menu of the Explorer window to open.

Step 2

Navigate to the correct folder "1". 

Note: If there are or were multiple instances of ISL Light Client running each will have its own enumerated folder. Usually the one with the newest "Date Modified" is the one you are looking for.

Step 3

The log file is named ISLClient.out