Yes, its possible, although i could be wrong below. If i own a project, code written entirely by me and released it under GPL or any other license, i'm still free to change the license to proprietary/restricted etc. However there are a few things which would have changed since the original relese 1. Any one holding the gpl'ed source code can still use/distribute/modify it etc. So someone can come up with a fork and continue with the project 2. I cannot take modifications submitted by other into my new closed source project as others would have submitted them under GPL license, unless i have the permission of the contributors. This includes modification to any fork or contribution to the original source code before the license change hth, jb