@Marius,
I’m glad you ask those questions, and I would be happy to answer
As I wrote before, while a user is downloading one of our free applications it offers two basic installs, typical installation, which lists the add-on features such as searchqu default search, and Custom installation, which allows you to select the add-ons that you wish to install, in any time you can restore your previous default search back.
Searchqu does not collect or save any personal information about users. The only thing Searchqu saves is aggregated data, which is not personal data, e.g. the number of visits to pages and number of clicks on different sections, and therefore searchqu certainly can’t be classified by the definition of a malware, only a browser setting :)
I hope we helped and answered your questions :)
The Searchqu support team.