First, you need to understand these are user-to-user forums, not a contact for Magix support so no-one here can help you directly. At the foot of every forum page is a "Contact" button which will allow you to contact Magix support if you wish to do that.
However, as a general rule, all Trial version of Magix software are in some way "limited", either by e.g. not allowing additional content to be downloaded, or by restricting the ability to export a finished product. So, I think it is unlikely that you would be able to gain
full functionality without any limits or restrictions for 4 days
since those restrictions are built-in to the Trial versions. I very much doubt that anyone can remove them.
However, if you are able to specify exactly which program you are wanting to use, what you are wanting to be able to do with it and are prepared to read this post to see what information we really need about your computer, it is possible that one of we fellow-users may be able to advise you.