Try this:

1. click help>troubleshootinginformation
2. click to 'profiles' and click 'about:profiles'
3. in upper left is 'create profile' button click it
4. click next
5. on this screen, enter shortname, e.g., Dprofile
6. , second, click the browse button at bottom and locate and select the profile on drive D
7. click finish and launch and see if that works .

many thanks David for that, Unhappily for something I did (installing a new thunderbird) I did manage to find with tb -p the profile and substituted my Win10 TB profile. This resulted in "unable to find Porfile or unacceptable profile error message - hence no help list. Trued to delete TB but command line said TB not installed but I am able on Place>internet 2 Thunderbirds on list but neither of them lead to TB opening. One had a red print list in a box ending with an http// address which can't be copied, The other give the profile not found or unacceptable.

I am grateful for your suggestion D Watson

It may help to know what you were attempting to do on the Windows PC. With that information, maybe we can give better information

Hi David,

Having accumulated emails from way back there are a number I wish to keep. Moving to Linux Mint on a new PC I wished to move my old TB profile to the new PC. I opened a thunderbird mail account of one my email accounts which worked fine and received new emails. TB profile on windows is a static name. I was expecting to find that on Linux but failed, because I used my name as the profile name. I also failed to find a method of installing my TB profile from windows in Linux TB. I assume the TB -p is not tb's true profile but my name for it.

If I could locate the true location of tb linux profile file and its true name I could change my windows tb file name to the linux tb profile name and believe I would have all those saved emails displayed on Linux?

Doug

Thanks David that did resolve the issue and I am now able to see old emails on Linux.

What I hadn't appreciated was that each email account needed setting up on the new TB Linux to access the old profile.

hanks again.

Doug