Thunderbird is not downloading new inbox emails

I understand the frustration you're facing with Thunderbird not downloading new inbox emails on two different PCs. It's possible that the new version might be causing this issue. To troubleshoot, you can try a few steps. First, ensure you have a stable internet connection. Next, you might want to restart Thunderbird and see if that resolves the problem. If not, you could try disabling any add-ons or extensions temporarily to see if they're causing the conflict. Additionally, you might want to check your email account settings to make sure they are configured correctly. If these steps don't work, you could consider reinstalling Thunderbird or checking for updates.