I've managed to fix the problem.
Somehow it didn't work because I had some sort of dialing connection via phoneline to my printer. Recently I've switched from provider which caused some problems with it. But after deleting this connection, it fixed it.
I found it in Chrome: Settings>Proxysettings>Connections and in the list of VPNs etc I found it.
Recently I've been getting whitescreens when opening features of Alt1.
On startup, the menu of which feature to choose works fine. Yet when I select ie Cluesolver, it gives me a white screen. (settings works fine)
Even after waiting for more than 10 minutes, nothing happens.
I have already tried reïnstalling it.
Thanks (again)
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