Cannot open email, pops up Launch Application

[JudyE]

I’m using Thunderbird 6.8.0. When I open an email, and click content to “Read more” of the article, I get a pop up entitled Launch Application. This happens even for Help>Contents and Help>Release Notes. I tried to use the Support in Thunderbird/Firefox but it didn’t accept my older username and password. So I had to re-register. But when I get the email to “Verify Your Account” and click the “Verify Now” button in that email, I get the same pop up entitled Launch Application. It was OK yesterday and I was able to open my emails and click through them this morning, but now I can’t. I tried Restart With Add-on Disabled, which is only a calendar, but that didn’t help.

[DanRaisch]

This question should be posted to the Thunderbird Support forum but to do that you would need to register on these forums, which are not the same as Mozilla Support.

[JudyE]

Thank you for your reply. I tried Thunderbird support forum which I thought I did here too. As stated, I cannot register or sign in to any of these forums. I guess my sign ins are too old cause it wouldn't accept any of them. I tried to re-register and the email to "Verify Account" button in the email to register will not click either because I continue to get that Launch Application pop up whenever I click a link in an email. So that's why I'm here.

But I performed a system restore and that fixed it. So I don't know what caused it within a 12 hour window.
Thank you again for your reply.