1. Does UHD After Editor support HDR10, HDR10+, Dolby Vision?
Yes. They are supported.
2. Does Blu-ray After Editor and UHD After Editor support one mpls, multiple m2ts movies?
"one mpls, multiple m2ts movies" are supported.
But one problem If I dont replace them , I cant change language. Am I right?
If you don't replace them, languages cannot be changed at present.
How should I do in 0800.mpls?
Select that title, click Edit to proceed, it's like you edit other regular titles.