Jan,
Apologies for the delayed response.Thank you for asking, we appreciate your interest in Webclipse.
The software itself is the same for Personal and Commercial Webclipse licenses. Commercial licensing is for team/corporate use, 2 or more users. Team licenses do provide for reassignment as members move across the organization, but are not floating licenses.
Our License Agreement (agreed to upon download of the software) does require one license for each developer using the software : https://www.genuitec.com/products/webclipse/eula/
If you have any other questions regarding licensing or purchase, you can also contact our sales team directly, at sales@genuitec.com
Hope this helps. Please let us know if you have any questions. Apologies once again for the delayed response.
–Swapna
MyEclipse Support