[alwann]

On background, I'm getting a Runtime Error indication when attempting to edit and produce a long video. I was advised to delete my C++ library and install an update.

Looking at files, I see multiple installations of C++, some dating back years. Do I need more than one?

For what it's worth, I'm editing with AVS Video Editor which, in my opinion, is dog scat. So many crashes, weak online support.

[JimD]

That is a common complaint going back to 2011 with that software.
you should check
control panel>admin tools>>event viewer.

In that, you will see the application and system logs. you can check there to see what is causing the problem.