In July I download version 9.1 and it said it supports Autocad 2018, today I noticed version 9.1 supports Autocad 2020. Do I have to upgrade to get this support on my version 9.1?

;ZB.LSP ZOOM BOX like ZOOM Dynamic except done on current display ; doesn't handle keyboard except space, return and arrow keys ; (defun drawbox () ; draw the box (grdraw ll ul -1) (grdraw ul ur -1) (grdraw ur lr -1) (grdraw lr ll -1) (if (= mode 0) (cenx) (arrow)) ) (defun cenx () ; draw center X (...

Qleader and leader does not work with 2 pick points like in AutoCad, used in the Balloon and LDR lisp.
They have been modified to read (Command ".leader" PT1 PT2 "" "" "n") (Command) and now works.