Thanks for all the options, that you have figured out.
I like it simple and clean. So, this is my favorite:
Set date [StopWatch] value to the current date/time
Write '[Purple] {EXP:({DATETICKS} - {DATETICKS:StopWatch}) / 10000000} sec' to log
I wasn't aware, that I only have to divide the Dateticks by 10000000 to get the value in seconds.
What I have found, is that VA [1.5.12] is getting incredibly slow after a reboot.
A special command needs more than a second (1.3) to finish. Everything feels very laggy overall.
What helps, is to reinstall VA and the same command needs only 0.2 seconds and VA feels much more responsive again.
Aha. "Good" to know I'm not alone in this, in a weird way.
Everyone, that uses a comma as decimal separator, should be affected.
But it seems, that the decimal tokens are not used very often.