There is an update to the aircraft over on the x-plane.org site linked in the support pages:
https://forums.x-plane.org/applications/core/interface/file/attachment.php?id=393191
If for some reason you also experience this, you need to unzip that file into
JF_PA28_Turbo_Arrow\plugins\SASL3_Tbient\data\modules\Custom Module\ANIM_EXTR\T_Tail
This will stop the aggressive nose down pitching on flap deployment that is noticeable under certain circumstances, which are best explained by Dan Klaue of Thranda Design here: https://forums.x-plane.org/index.php?/forums/topic/171747-pa-28-turbo-arrow-trim/&tab=comments#comment-1596760
The Turbo Arrow IV (T-Tail) is now much more manageable and certainly does not require the trim I was having to dial in before. She now lands like I am sure she should...
Andrew