How to apply licence after evaluation has expired?

Hi,
after my Evaluation Period has expired, I want to connect my VP to a running license server with a valid license. However, VP now only displays this:

And I cannot find a way to enter a license or connect to a license server.

Can someone please help me here?

Thx + regards,
Jörg

By default the activation button should be enabled under different license mode. Would you please send me your vp.log file for diagnosis on your case? You can find it under %appdata%\VisualParadigm folder. Simply enter %appdata%\VisualParadigm to the address bar of the Windows Explorer will bring your there. You can send your log file to support-team@visual-paradigm.com for diagnosis. Thanks and look forward to hearing from you.