If you purchase RC you you can download the Beta version, this is being developed day to day with new features added and bugs fixed.
Attila is there all the time engaging with users.

RapidComposer v4.7b7 is available!

Lots of improvements for MIDI CC editing, and a new melody generator (idea by Chris Caulder) in this update.

Improvements:

Copying/pasting MIDI CC events is possible: "Select all", "Copy selection", "Paste to current time", "Remove selection" added to CC menu
MIDI CC editor rubberbox selection improvements: hold Shift to extend selection vertically to all values
MIDI CC values can be set for multiple events at once
Reset button added to the MIDI CC function generator
Fixed: after an undo in the MIDI CC editor, the tool selection was not restored
New phrase generator: "Melody Generator v2". This works on the scales specified by the chords rather than the master track scale, and has scale tone usage options. Settings were simplified.
Experimental: import chords from MusicXML files (.musicxml or .xml; .mxl files need to be unzipped!). You can drop a MusicXML file to the progression browser. Please note: not all such files include harmony tags, the chords are extracted from the harmony tags!