Thunderbird not updating

I have posted this problem to many forums but still didn’t find a solution. I use Acer Aspire V 13 notebook just 3 months old with Windows8.1 I use Thunderbird for may POP emails, abour 5 email addresses. Last night I upgraded to Windows 10 and got problem with Thunderbird.I updated it yesterday to version 11.0.1 but after updating when I restarted it, the calendar was not displayed.I restarted it several times, but the same problem was seen.

I suggest to all of you guys to study the update fully before accepting it for your system otherwise the whole family of application add-ons is affected. I waited long for this update, and when the update was released I went through it thoroughly about what will be its consequences on my system. Please before updating your software be very sure how this update is going to effect the present add-ons on the system.You should always have an opportunity to back out of the update if you see anything suspicious regarding your add-ons.If your folders do not automatically sync and your software is not listed below, please consult with your software vendor's support documentation.

Hello, I am using Thunderbird calendar for a few days now to manage my schedule easily.

Please refer to Release Notes for version 52.0 to see the list of improvements and fixed issues.