Are you aware that v45 is a pre-release build and as such, won't necessarily be covered by current documentation?

If you don't specifically intend to be one of our beta testers, do you have a particular reason for using v45?

The current stable release is v38.6 or maybe 38.7.

I am not sure which site I used to download. I probably did not notice that v45.0 is a pre-release version.

grahamn,

Important question, do you see the same problem with version 45 started in safe mode??

(I'm running 45 on windows 7 and I do not see what you are reporting)

My computer will not connect to the net in safe mode so I can't check. I'll download the current version of Thunderbird.

Not windows safe mode. I'm talking about Thunderbird safe mode - https://support.mozilla.org/en-US/kb/safe-mode

ALso a screen shot would be helpful https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

I removed v45 and loaded v38.7.1. I have now overcome the problem. Thanks for your help.

For your information I have attached the screen shot