when I updated my Adobe Flash to watch videos instead of updating what was already there, Firefox created a second file. Now, when I try to watch a movie I am told I need to get the latest version. I have the latest version, but Firefox keeps trying to use the older version. I have set the old version to Never Use and then the new one also ends up on that setting and I am told I have no Flash and I need to download it. How do I get rid of the old Flash or both versions so I can start over?