Hello Yutaka.
>As for Q4, currently, EmEditor can’t highlight multiline keywords.
It is very bad news to me. It will be changed in future versions? If “No”, in what latest version it worked?

I transferred to version 14.9.0 beta 4, made reset of all settings (as you prompted). All questions are removed!
But decisions on Q4 and Q5 which you read correct, don’t suit me, excuse.