I was looking around my themes in the control panel and noticed that I no longer see settings etc for my current active theme (Constructor). My site is working fine using the theme, and the folder is there along with about 7 other themes, but I only see the 7 themes in the themes section. I discovered this while playing with a sandbox version of my site. I wanted to see how it looked with another theme before committing and found that I could not change it back to constructor as it did not show in the thumbnails presented. Any ideas?