In an older version of Windows, they are stored in:
system drive:\Documents and Settings\[owner-user name]\Application Data\Sony\Render Templates
.sft2 files
Hopefully that will help you find them in Win10.
Thank you, you helped me, I found my templates! But, somehow, Vegas doesn’t see them. Can you help me (after 9 years), where should I put these templates to make Vegas see them again?
For modern versions of Vegas Pro, the custom render template folder is in C:\Users\user name\AppData\Roaming\VEGAS\Render Templates. However, that folder is only created once a custom template has been saved on that computer. While it's simple enough to add a folder named 'Render Templates', you'll also need to create a subfolder named for the render format: for example, this is my folder:
As you've found your custom render templates, presumably the subfolder names are also there so it will just be a matter of creating the 'Render Templates' folder and then copy/pasting the subfolders into that folder.