Marketpress preview images

Hi Support,

We are using Marketpress on a site and notice that each month it copies the thumbnail 150x150 images to the new month.

Is their a way to level the thumbnail 150x150 image in the original upload directory instead of coping it each month as over time it will take allot of disk space and also it changes the caching on the system.

For no real gain.

I look forward to your reply