Single close tab button disappeared Rated 4 out of 5 stars

I like this skin but the latest version has a small problem:

I installed the updated version 3.0.0.87 and I use the browser option to use a single close button for tabs: (about:config > browser.tabs.closeButtons=3) and with the latest version the close tab button disappeared. I had to revert to version 3.0.0.75 to make it work again. Please fix this. Thank you.

Ps. I know the reviews are not meant for bug reports, but ther support forum loaded in Chinese language, which I don't master unfortunately.

This review is for a previous version of the add-on (3.0.0.87).