It could be to make a track how many people download the same.
QlikSense is same as QlikView.
for both you have to register.
Qlikview Sense desktop .96 it is available for Free to use. This is not related with you current V11 license.
You can read more here:http://community.qlik.com/docs/DOC-6922
Is Qlik Sense Desktop Supported under maintenance?
Qlik Sense Desktop is a free and unlicensed product, and therefore has no maintenance agreement.
As far as I understood, the standard version is scheduled for September ?