>The app should not be resetting the theme. You'll need to contact the publisher about it.
>
>>I re-set the theme, but it's kind of annoying to do this again and again.

I'm not yet 100% convinced it was Team Viewer application that did it, but it did happen after I run it. And the previous time it also happened after I ran Team Viewer, although it restored itself after I closed it that time.