Is it possible yet to change meter for just one instrument? (E.g. most instruments in 6/8, but one in 2/4.) I thought I saw something about this but can’t find it. I have the latest upgrade.
I found this in the change log document for 1.0.2 update :
Note input
To create a time signature or key signature that applies only to the staff on which the caret is currently located, enter the time signature or key signature into the Shift+M or Shift+K popover as usual, and type Alt+Return (instead of Return alone) to confirm the item to be created.
With the caveat that the bars will not currently line up. Only quarter = quarter is available at the moment.
Right, Steve, which makes it useless for my purpose. I just have to do tuplets.
Only like the attached, which could be improved with more care.

Is this still not supported?
There has been lots of activity on this subject, you found a very old thread. Here is a more recent thread with a link to a helpful Scoring Notes article: