All I did was install the latest quicktime, then I went to render a video in vegas 13 and mainconcept section is missing. i uninstalled and reinstalled Vegas 13 movie Studio and it is still gone..... what to do?
Problem solved. IN the upper right side there is a filters options, I clicked the video templates only checkbox then unchecked it and it refreshed everything and now it shows.
What is weird is it keeps doing it. When I went into it again it disappeared again and it said filters off. So I click on a filter and unclick a filter to bring everything back again.