Is the old PC still available? If so, they can be copied from the old profile. Or, you can transport the entire profile. Let me know, and I'll try to assist.

Hello David, the old pc is not available. The chef of the pc shop said me, there are no problems, to install the programms. Now, I have a call with the customer, and in the next days, he will help me, to find the old datas. I will give you an answer, when I have the clearing. Thank you very much!

Okay, I'll be glad to assist.

If it was a Windows PC, the default profile would be in c:\users\<yourid>\appdata\roaming\thunderbird. If that entire thunderbird folder can be retrieved, you will have 100% of your data (assuming you used the default setup).

Hello David, thank you for your anwers. Now, I have solved some problems of my pc with help from the pc shop. He has combined thunderbird. Now it is running.

You are welcome.. I am glad for you that all is working now, :)