I can understand if the developer might want to charge an additional fee for extra themes for the free version of Memory Clean, but even then, it should be a one-time fee which covers ALL themes, and NOT an additional fee for each individual extra theme. While I truly appreciate what this app does - and thus, I purchased the 'Extreme Clean' version of this same app in the Mac App Store - I feel that it is a bad move on the part of the developer to charge additional fees in order to access the extra themes.
