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.