@Grazie is that all you have installed in the Vegas Pro 23.0 folder? Then the installation isn't complete. There should be more in that folder than just the Capture folder.
Here is a screenshot of the Vegas Pro 23.0 folder.
I'll add that I do have some plugins tossed in there, but you get the idea of the size of the folder and how many files it should have.
@Reyfox - @Grazie, is that all you have installed in the Vegas Pro 23.0 folder? Then the installation isn't complete. There should be more in that folder than just the Capture folder.
Yes - Well, exactly.
A complete uninstall, and then what do I install, considering the multitude of items?
@Grazie with Vegas (IIRC), if you run the installer again, it will present you a button (if the software was installed) to Remove the software. That is what I would do.
YES: went through a very long install procedure with many couldn't find warnings. FINISHED UP WITH NO VP23 in the folder, still the same Capture Folder, and that's all.
Something is terribly wrong on your end. Download Revo Uninstaller Free and uninstall Vegas Pro 23 and any other Vegas 23 associated files like Addons and Deep Learning Models.
Then after uninstalling, restart your computer and install again... I hope this works for you.