Hey,
A long time ago we had some e-mail contact about Showtime. I'm still using it and it works as it should.
Back then we did have some discussion about the way Showtime saves images. I still think it's not necessary to save the Source and Preview.
For part of my folders i have deleted the images in Source folders. I did not do that for Preview. I think i can remember that it was considered to add a feature to give users a option not using Source and/or Preview? Do i remember this right? And if yes: will the feature be added in the future?