Where could I download Intel Parallel Studio XE Update 7?
On my personal Intel Softaware Development Products page I only have access up to update 6 for version 2015.
It could be that your license's support term ended before 2015 Update 7 was released. I see it on my page. The "activation date" for that update was June 6, 2016.
For more complete information about compiler optimizations, see our Optimization Notice.