Answer:
If the "Authorization" dialog box (Image 01) does not appear at the program start, an authorization file was imported at an earlier point in time.
In this case, select the "Diagnostics" option in the menu "Help → Authorization" (Image 02).
Save the text file, then open it. In File Explorer, set the path displayed under "PermDataDirectory" (Image 03). In this directory, you will find the AUTHORE.INI file. Delete this file.
When you start the program next time, the dialog box shown in Image 01 will appear. To activate the license, select the "Use full version" option. The license activation requires an Internet connection.