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Out of context, this means nothing. The section 1. clearly state:

"Software License. Subject to the restrictions below and other terms of this Agreement, Adobe hereby grants you a non-exclusive, worldwide, royalty free license to use, reproduce, prepare derivative works from, publicly display, publicly perform, distribute and sublicense the Software for any purpose. "

Yes they could have used the BSD license, and I have already asked them several time. Nonetheless the license of the source code qualifies as "open source".