It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

I had issues installing this and it turned out it was my fault :o)

The Dev Team answered within half (!) an hour superfast e-mail.

Just add GOG Achievements and you will get a 10/10 from me.