If you have any questions about TKaraoke, see the TKaraoke Forum.
Note that the forum requires a different account and you can sign up here.
Tech Support using Instant Messager
For tech support over instant messager, click on the chat icon: 
IM tech support is available to Pro version users only.
For tech support on the Free version, please visit the forum.
Support Hours:
Vietnam (UTC/UTM + 7): 8:00 AM - 11:30 AM, 1:30PM - 5:30PM
Pacific Standard Time (UTC/UTM - 8): 6:00 PM - 9:30 PM, 11:30PM - 3:30AM