I purchased version 3.5. They had a standard and a pro edition. Version 4 is 2-3X as expensive since there is no longer a standard edition. While it's a nice tool, it's priced itself out of the range of the everyday Ruby or Python scripter who does not need web-based apps, CSS, XML, and Ajax. All I wanted was to program in Ruby and Python with decent tools to automate my system -- I can't justify the increased cost for a wealth of features that I don't need.