CAPS 0.9.3's guitar amplification contains four new tonestacks,
distortion asymmetry dependent on output power and other sound
improvements. The modulation of the mono chorus has been smoothened,
and the Plate default parameters have been restored to be nearer the
more reverberant response of the older versions.
http://quitte.de/dsp/caps.html
There's also a 0.4.6 release, stamped 'obsolete', containing all the
plugins that were in 0.4.5 but did not make the cut to 0.9. There are
no duplicate plugin IDs, and the library is differently named, so both
versions can co-exist on one system.
http://quitte.de/dsp/caps.html#Older_Versions