Having trouble installing Rated 3 out of 5 stars

I have just tried to install this add-on to Thunderbird 31.3.0.

It says it is installed, but when I right-click the Toolbar and select customize, I cannot find a button labelled "Titlebar Cleaner" in the list of available icons.
Please help.

You saved me Rated 5 out of 5 stars

Thank you. Your add-on has enabled me to continue using my Stardock Windows interface skin with the *latest* version of Thunderbird. Before I discovered Titlebar Tabs Cleaner, I was stuck using Thunderbird 16, since all newer versions of Thunderbird wreaked havoc with my Stardock interface skin. Awesome.

Cool... :-)

... I use Windowblinds also! There seems to be an arms race between Mozilla and the OS skinners to obliterate each other. I am usually doing my best to keep the Mozilla site in check (I know it looks great with Windows Aero, but not every Windows user has Aero)

Perfect! Rated 5 out of 5 stars

Just those few mm make a huge difference!

Perfect Rated 5 out of 5 stars

Does exactly what it promises. The only minor problem I had was finding the Tabs Cleaner icon. This is not the fault of the add-on - Mozilla have messed up the toolbars so badly, I can't find *anything* now. But once I found the icon everything became more familiar. Thanks!

Works perfectly - thanks Rated 5 out of 5 stars

This add-on fixed an issue for me. After upgrading to TB 17 one of my favorite add-ons was no longer working. Thanks to Titlebar Tabs Cleaner everything is now working as before. Thanks so much!

This review is for a previous version of the add-on (0.3). 

works like charm Rated 5 out of 5 stars

thank you for this Add-on.
A lot of Themes don't support the new Design of TB17 and with this Add-on you can quickly fix this untill all Themes supports the new Design!

This review is for a previous version of the add-on (0.1.3). 

Rated 5 out of 5 stars

Works like a charm, just as promised. Many thanks!

This review is for a previous version of the add-on (0.1.3).