GUI Problem
There's a huge problem about GUI,when I add about 24 audio track,the GUI seems remain only 2 Frame per second,every operation need's to wait  about 0.5-1 second like zoom in,scroll up and down.I tried switched off the audio engine , no difference.
 
The project only contains 24 audio tracks ,no vst loadded.
That's pretty annoying.my GPU is GTX 1070,and a xeon 12 core CPU@3.5GHZ. 24G memory.

Is it possible the PAUSE button is engaged? Check the bottom of the screen to see if theres a "P" showing, if so press pause on your keyboard to disengage.

Hope that helps.

Could be background operations or latency is set to high and or buffers set too low.
 
Are you using the latest ASIO drivers specific to your audio interface?
 
Have you configured Windows to run in high performance?
 
Set it to give apps power preferences over OS?