Check first to see what you have. One of this is likely the beta version. If so, I suggest removing the beta. To be safe, I suggest you verify that they each use different profiles to ensure you don't remove the primary one. And, to be extra safe, I always suggest backing up the profile when doing such as this, especially because communicating via forum sometimes misses key information.

Thanks, David. I'm using 115.7.0 with profile gasu8cec.default -release

All profiles listed are in the screenshot - I assume all the others are for the previous version. No idea why there are 2 gasu8cec.default -release

I see they're all in the ...appdata\roaming\thunderbird\profiles folder. My suggestion: - backup the entire thunderbird/profiles folder - uninstall the other thunderbird - restart thunderbird and verify all is ok - then you can delete the unwanted profiles.

Hi David, I did that and TB was wiped out on my D drive! I reinstalled and got TB back, with my old emails. It's very strange - it's in Apps/Startup apps, but doesn't show up in the taskbar or minimised, where it used to be. According to task Manager, it's running!

It's very disturbing that Thunderbird has at least twice lost most of my previous emails in its various reincarnations - they disappear into folders in Profiles that I can't access without a lot of fiddling. I still have to keep running my old Pegasus Mail alongside - it has all of my emails from before the Flood!

Yet again, according to both RevoUnistaller and Iobit Uninstaller, I have two versions of TB installed - v 115.7.0 and 115.8.1, both supposedly installed on 6/3/24 with the same uninstall path. What is going on?

Apps/Installed apps also shows two, one on 18/2 and the other on 6/3

I think this may be some leftover registry entries. I suggest ignoring it. If interested, there is a terrific, little, FREE program at https://www.voidtools.com/ called everything. It is an amazing little tool that can find anything on hard drive in milliseconds. If you install it and ask it to locate all instances of thunderbird.exe, it will show you how many there are.

I have Everything - it only show one thunderbird.exe. This happens again and again - see earlier in thread. It would be nice to be able to stop it! It's as though the update leaves stuff behind

I am not a registry guru, not even close. Why this happens, I do not know, but I do see it sometimes when updating other apps as well. Uninstaller apps see something that implies two installations, but my suggestion remains: just ignore it.

Can’t remember it happening in the last 30 years with any other app - that’s why it’s such a surprise