Worked, thanks.
Also, it is best to check where your old save is before doing anything. Pathways may be different.
For example, the original was as listed, you can go into edit of the file and see that HKEY_CURRENT_USER\SOFTWARE\AppDataLow\Software\NobleG\Virus-Z extension up top.
For me my save was actually HKEY_CURRENT_USER\SOFTWARE\NobleG\Virus-Z
Located there. You will notice something is wrong if you go look and see two floating extensions in registry.
In this case, if the one provided of full save doesn't work, delete it. Go back to the file. Open up notepad and change the extension, then add it again.