Current release is 5.x. Current documentation applies for Versions 4.x and 5.x. Improvements are marked in the documentation, including the version where the improvement was introduced.
For documentation of the 3.x release (not supported any longer), please refer to https://interconcept.atlassian.net/wiki/display/ICTIME3
For documentation of the 2.x release (not supported any longer), please refer to https://interconcept.atlassian.net/wiki/display/ICTJP/.