The currently shipping version number is found in one location: this website in the Support page. Your ccScan version number is located in the ccScan main Help menu, About…, opposite the word Version.
Major new versions are denoted by the first digit. Minor versions appear in the second set of 1 or 2 digits. The third pair of digits is the Revision number which includes bug fixes, clarifications and minor corrections. The final 4 or 5 digit group is the Build number denoting any change, trivial or otherwise.