Older Versions 

v1.4.1: Configurable rating, with sliders to select rating mode and memory.
v1.4.1 (Universal binary)
v1.4.1 Source

v1.2.1: Longer timeout while getting tracks - works with larger libraries, bugfix for countries that do not use "-1.0" notation
  AutoRate 1.2.1 (Universal binary)
  AutoRate 1.2.1 Source code

v1.2: Cache analysis results, only analyse weekly; few small bug fixes, enhanced Rate Now script
  AutoRate 1.2 (Universal binary)
  AutoRate 1.2 Source code

v1.1.1: Extra error checking
  AutoRate 1.1.1 (Universal binary)
  AutoRate 1.1.1 Source code

v1.1: Added playlist selection
  AutoRate 1.1 (Universal binary)
  AutoRate 1.1 Source code

v1.0: Initial release
  AutoRate 1.0 (Universal binary)
  AutoRate 1.0 Source code