Peter100: I had PD9 installed on one computer and then bought the full version of PD10 Ultra for the second computer. Like you, I wanted the Holiday Pack that came with PD9. So I transfered the Holiday Pack files to the right folder on my PD10 computer and PD10 recognized the PD9 files right away. No need to install or do anything fancy.
If you did an upgrade, your old PD9 Holiday Pack might have been blown away, but if you have a backup, you should be able to find the Holiday Pack folder, restore it, and then move them to the correct PD10 folder. In my case, it was under C:\Program Files (x86)\Cyberlink\Templates\Menus.
Hope this helps. Have a great day.
Regards,
-Phil
Windows 10 Pro x64
Dell XPS 8930
Intel CoreT i7 (4.6 GHz)
32 GB DDR4-2666 RAM
1 TB PCIe -x4 SSD
NVIDIA GeForce RTX 2060
PD14 Ultimate x64, 4207
CD4 Ultra and AD6 Ultra
Bleeping Computer Malware Response Instructor