jbs4radio

I have used Paint.Net for a while now and have enjoyed my experience. However, when I updated to version 3.5.5 I encountered a problem I have been unable to relsolve with my layers. I used to see tiny windows usually on the right side of the screen for each of the layers I was editing / merging. I no longer get those windows available even if I try to Add New layers. Anyone know how to repair this so I can continue to utilize layered images? Thanks for the Help! Jared B. Sams