Hello, can someone help me, please with ABBYY instalation on of line computer?

I bought ABBYY FineReadr 11 for my client and I need to install it on his computer - the computer is (and must remain) of line.
All I have is the serial number of the purchased product.

As I thought, this problem could be solve with help of ADOBE support - probably by sending an email with some "code" under which the product can be installed of line ... 

In direct ADOBE support they have not been able to help me and they refer to this option - without specifying whom to address...

Please know anyone, how to deal this situation (with or without ADOBE support) or to whom address this question?

Thank you very much

Alena