Make a backup copy of your “Documents/Holiday Lights Designer 4/” folder.
Uninstall any previous version and then follow the steps below.
Run the original Install: http://holidaysoft.fileburst.com/releasev42008_b/setup.exe
If you don't remember your unlock code then send an email to firstname.lastname@example.org
Once you have it installed the original version and you verify it runs then you can download the latest update here:http://holidaysoft.fileburst.com/Version4019/Setup.exe
If you want to restore your previous import libraries:
Open the ImageLibs folder from the backup you made of “Documents/Holiday Lights Designer 4/ImageLlibs”
Copy Imported.cxt and Originals.cxt and replace them in Documents/Holiday Lights Designer 4/ImageLibs/