Close Inky and clear your cache with one of the following steps:

1. Go to Inky Help menu-->Troubleshooting-->Delete Inky data


2. Manually delete the Arcode folder.

On Windows: Select "Local Disk" C: 

Then drill down to users-->your username-->AppData-->Local

On Mac: Type in ~/Library/Application Support/  

You will see a folder called "Arcode". Right-click on this folder and move to trash.

Note: Make sure Inky is not running while manually clearing your cache.