Hello Michalis,
Thank you for contacting us.CW10.x has 4 versions: special, basic, standard and professional.
You will see each version feature and price here:http://www.freescale.com/webapp/sps/site/overview.jsp?code=CW_SUITES&tid=CWHwe will see only special edition is free. special edition has 128 KB C object code size limit for Kinetis K Series and 64KB C object code size limit Kinetis E, L, M Series.
In addition you can install one or more CW version without problems!!
Have a great day,
Sol
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