The only information sent to the server is the version of PsychoPy you're using, and info about your operating system. There is nothing that identifies you (e.g. username) or provides any personal information about you. The IP address is also received (as with any time you access a web page from your browser) but is immediately encrypted (we can't decode it).

(NB. Every time you look at any web page in your browser you provide the owner of that page with much more information than this!)

The information received will only ever be used for the development of PsychoPy. It will never ever be sold or passed on to other companies for other purposes.