Here are presets for Insta360Pro cameras, for two different camera resolution settings: 3200x2400 and 3840x2160 pixels. Be sure to center each camera and then use Improve Alignment to correct for different camera units.  

Insta360Pro.zip

Thanks, Roman!  Will test it out today.

Do you now or will you support Insta360Pro gyro stabilization file with preset?

And for the footages in 8K i can not find any presets to download.. in the vimeo's tutorial they explain that we need to choose one preset to stitch but don't explain where we can download them. and this preset here is only for 3200x2400 and 3840x2160 Thanks for any help

For 8k, you'll need to use the 3840×2160 preset. That's the resolution recorded by each lens, not the final output resolution. 6K stereo 3D records at 3200x2400, which is the other preset.   Hope that helps :-)