Save a backup copy of the message containing the new license key.
Start Syncro SVN Client.
Copy to the clipboard the license text as explained in the message.
If this is a new install of Syncro SVN Client, the registration dialog is displayed automatically at start-up. In the
case you already used Syncro SVN Client and obtained a new license, use the menu option
Help / Register
Paste the license text in the registration dialog.