I suggest doing a backup first of the profile. If using Windows, that would be at c:\users\<yourid>\appdata\roaming\thunderbird (not generally needed, but I like being safe.) Now download and install thunderbird. It will overlay any remaining remnants. I have no idea what may have deleted the prior version, possibly an antivirus program?

Hi David,

I have copied the profile folder to a folder I created in 'My Documents' called 'thunderbird' I had this same problem back in 2022 and I think it may have been you who helped me retrieve my data back then ? I don't know why this has happened, I just opened my PC to access my client folders and received the message about the shortcut not working ?

I will download and install thunderbird now.

Thank you very much

Hi David, I have downloaded thunderbird again, and everything is back !? That's amazing, thank you so much. The last time this happened it wasn't that easy and it took us hours ?

What a relief !! Thank you so much. I am so grateful David.

Very best wishes to you.

Ray

You're welcome, but if you are using an antivirus, I suggest seeing if it is the culprit. Some such software removes software without notifying the user, and that seems to be happening to you. A possibility is to see how to exclude some programs from being monitored. I wish you well.