Vegas Movie Studio 15 does not have customizable render templates and has several other restrictions as well compared to Vegas Movie Studio 15 Platinum. Platinum also includes the current Vegas DVD Architect and is recommended. Note that this software now comes from MAGIX, not from Sony any more.

The product comparison table is here:

https://www.vegascreativesoftware.com/us/vegas-movie-studio/product-comparison/#productMenu

The system requirements are here:

https://www.vegascreativesoftware.com/us/vegas-movie-studio/specifications/#productMenu

You can go to https://www.vegascreativesoftware.com/us/vegas-movie-studio-platinum/ and choose your purchase option there. "You can upgrade at a reduced price with a previous version or other authorized product. Please have your login details or serial number ready." From here:

"If you're logged in while buying, our system will automatically search for a valid software to upgrade from in your user account. If it doesn't find anything (because you didn't register or using a different account), you will be asked to enter the serial number of that software.

It is true that you can get the newest VP version with your Movie Studio for the upgrade price. Just visit the product page and click the upgrade button. Best thing is to log in and let the system do the work as described above."

Please click to enlarge the screenshots.

If your old version is not valid, you need to choose the New purchase option and click Buy Now.