When my Thunderbird failed to function, I was advised to make a new account on my computer and download a new version of Thunderbird on to it, which I did, but my previous profiles folder somehow got deleted and I had no contacts. It was very difficult to manage two accounts as I found the new "person" could not use my programs under my account and I had to keep switching back. Searching my USB hard drive I use to back up my documents, I found a slightly older Profiles folder. As I only want one account on my computer I went back into that, deleted the defunct Thunderbird and installed the latest version for Windows 7. I carefully copied my profiles folder into where it should be through the C:\ drive - etc. etc. Opened my new Thunderbird and it now has two lots of profiles, so I deleted the new one, but it still won't work, there is nothing there. The new version is so different its hard to find my way round it.

What can i do about Thunderbird not reacting to my previous profile? Can I copy the contents of my old folder into the new folder created by Thunderbird?