If you tried to access ClixSense earlier today, you could see that the domain was redirected to a porn site,
then it became unavailable. Jim Grago, the admin and owner of the site was aware of the problem and made an announcement on the EMS forum.
The ClixSense admin told, in the last several weeks, the site was target of a hacker who he believes is the creator of the CSAdviewer bot. Today the hacker changed the site’s DNS settings and redirected the domain to a porn site.
According to the admin, the servers of ClixSense were not hacked, the user accounts were not affected. The site will be back online, although it might take a few or several hours due to DNS propagation.
You can find Jim’s forum post here.
Update: ClixSense is back for me now.
If you are still having problems, you can try to delete your browser history, temporary files and cookies. You can do that by pressing CTRL-SHIFT-DEL keys on your keyboard (at once). Alternatively, you can use CCleaner from here.
If you have ClixAddon installed, you can try to uninstall and reinstall it.
Update II: here