You don't need to uninstall to get the latest upgrade. You go to Help/About Thunderbird in the program. Thunderbird will allow free downloads. You do not have to pay to get a download. The Official Download page is here - https://www.thunderbird.net/en-US/thunderbird/all/

I am having the same problem...Thunderbird will not download, even after making a donation.

I payed and still cannot get a download to install.

First of all, you don't have to donate to download Thunderbird. Donations are voluntarily.

Where are you downloading from? Please post a link.

When you attempt to download Thunderbird, please explain in detail

• what you're doing,
• what happens, and
• what you expect to happen.

If there are any error messages, please post screenshots. https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem