In Tekla License Borrow Tool , in the Products area, click the Borrow Until box and select the expiration date for the borrowing period from the calendar.
The maximum borrowing period is one month.
Click the Borrow button.
The borrowing progress is displayed. After successful borrowing the Borrowed Licenses area shows the borrowed license.
Disconnect your computer from the license server and start Tekla Structures with the borrowed license to ensure that the borrowing succeeded.