In DcadWin.ini file in the program directory, edit with notepad and change to False
1LineTrim By Entity=TRUE
; Controls the behavior of the Entity toggle in 1LnTrim.
; If TRUE, Entity is automatically reset to on.
; If FALSE, Entity is automatically reset to off.
; If blank, the Entity toggle will retain its last status.
A nice resource for these questions
https://www.datacad.com/ddn/dcadwin.ini.htmlOpen and search by a term, I used "entity" to find this one.
Or, Program Preferences, Misc Tab, Lower Left area.