Hi, It's not a portable version and I have checked the Program Files.
I have backed up my seed and seems like it is the only way out now.
Have you installed it using the .msi or .exe? If its using the .msi, it will be located at the file location where you defined it at the start of location. AFAIK, there isn't a x64 installer, can you check your Program Files (x86)?
You can easily install it if you can't find it installed, just go to Control panel>Programs and Features. No restoration is required.