I'm back, ☺
according to my xOrganizer I have the v 1.8 version of the arrow, and version v1.9 is out now. I found this on the Just Flight website: https://support.justflight.com/support/solutions/articles/17000068631-pa-28r-turbo-arrow-iii-iv-xp11-changelog
At the bottom of the page I found this:
To download updates you will need to re-download the product from the 'Your Orders' section of your account which you can log into by clicking here.
But my Arrow isn't in "My Orders" of my account because I bought my arrow elswhere.
I re-downloaded en re-installed my Arrow already months ago but that didn't solve the problem at the time. Just to let you know.