There's something wrong with Video Editor. Why do I think that? Because:
I had started and saved a new project, imported a file into it in a new folder, having deleted older redundant folders. The imported file was a large .ts, which I had manually started caching. During the caching process the programme crashed and had to be closed. I don't know why it crashed - it hasn't done so before during caching. I reopened the existing project - the one I had just created - but what do I find? The old folders I had deleted and not the new one I had created.
When a project is saved, why, after a crash, doesn't it open up the way it was when you last saved it?
I say again, there is something wrong with Video Editor.