Hello, can you take a screenshot of how those files are being used?
Here is one example, the plugin strips all of these as unused even though they are splash screen needed files. Also the Poker game is a Common event driven setup where the cards are linked to var. 
["{\"Image\":\"pictures/ROCa3\",\"Sound Effect\":\"{\\\"Name\\\":\\\"\\\",\\\"Volume\\\":\\\"90\\\",\\\"Pitch\\\":\\\"100\\\",\\\"Pan\\\":\\\"0\\\"}\",\"BGM\":\"{\\\"Name\\\":\\\"\\\",\\\"Volume\\\":\\\"90\\\",\\\"Pitch\\\":\\\"100\\\",\\\"Pan\\\":\\\"0\\\"}\",\"Sound Delay\":\"0\"}","{\"Image\":\"pictures/controllerb\",\"Sound Effect\":\"{\\\"Name\\\":\\\"connect\\\",\\\"Volume\\\":\\\"90\\\",\\\"Pitch\\\":\\\"100\\\",\\\"Pan\\\":\\\"0\\\"}\",\"BGM\":\"{\\\"Name\\\":\\\"\\\",\\\"Volume\\\":\\\"90\\\",\\\"Pitch\\\":\\\"100\\\",\\\"Pan\\\":\\\"0\\\"}\",\"Sound Delay\":\"0\"}","{\"Image\":\"pictures/Bofynebunnies\",\"Sound Effect\":\"{\\\"Name\\\":\\\"Mizuki/Intro/wearethebofyneunit\\\",\\\"Volume\\\":\\\"80\\\",\\\"Pitch\\\":\\\"100\\\",\\\"Pan\\\":\\\"0\\\"}\",\"BGM\":\"{\\\"Name\\\":\\\"\\\",\\\"Volume\\\":\\\"80\\\",\\\"Pitch\\\":\\\"90\\\",\\\"Pan\\\":\\\"0\\\"}\",\"Sound Delay\":\"0\"}"]