In fact, if you read here:-
Quotes:-
"The terms and conditions for use of Steinberg software / hardware by you, the end user (hereinafter termed “Licensee”) appear below. By installing the software on your computer you agree to these terms and conditions. Please read the following text carefully in its entirety. If you do not approve these terms and conditions, you must not install this software.
In this event give back the product back to where you have purchased it (incl. all written material, the complete undamaged packing as well as the enclosed hardware) immediately but at the latest within 14 days in return for a refund of the purchase price."
And
“3. Activation of the software
Steinberg may use a compulsory activation of the software and a compulsory product registration of the OEM software for license control to protect the software against unlawful copying. If you do not accept the terms and conditions of this Agreement, the software will not work.
In such a case the product including the software may only be returned within 14 days following acquisition of the product. Upon return a claim according to § 11 shall not apply.”
By their own T&Cs you have 14 days to return if you do not accept. So i would read that as the cooling off period?