If you have an old license and then install a new version of PageFocus:

When you start the new version, you may see the following dialog box:

 (If you have PageFocus Pro, the dialog box title will show PageFocus Pro instead of PageFocus Draw).

Select the OK button and you will see the following dialog box:

If you have a new key (for the new version), you can select Yes to enter the key. If not, enter "No" to try out the version.