I would like to answer your questions.
-1. I thought this version has live tile, but I don't see it is live.
We just updated logo and Live Tile ICON in this version.
-2. there is check soft button 'check' at bottom, not sure how to use it.
If you have unfinished downloading progress, you can click on the 'check' button. You could continue to download the rest part; Or stop your downloading progress; Or delete unfinished downloading. This button can help you to switch to download management page.
-3. Not sure how to use Categories tab, is it just for subscriptions? I didn't subscribe anything, maybe that is why?
Please select a category first, and then slide to 'hot video' page, you would see the change.
If you have more questions, please send us the email via email@example.com