Can Proxy Objects be erased?

Is there a way to erase proxy objects? I can copy them after exploding, but I need to move or delete them. I tried the delproxy.arx, but I get this ERROR: AutoCAD.Application: Calling method SetObjectId of interface IAcadBaseObject failed

and I tried explodeproxy2018x64.arx, also get an error.

Thank you

I read something here but dunno if it works...

http://forums.augi.com/showthread.php?162410-REMOVING-PROXY-OBJECTS-FROM-AUTOCAD-2016

(defun gc:GetDictEntries (dict / result)
(and (= (type dict) 'ENAME) (setq dict (entget dict)))
(while
(setq dict (vl-member-if (function (lambda (x) (= (car x) 3))) (cdr dict)))
(setq result (cons (cons (cdar dict) (cdadr dict)) result))
)
(reverse result)
)

;; delete all AEC*
(defun c:removeAEC ()
(foreach dict (gc:GetDictEntries (namedobjdict))
(if (wcmatch (car dict) "*AEC*")
(foreach entry (gc:GetDictEntries (cdr dict))
(entdel (cdr entry))
)
(entdel (cdr dict))
);fin if
)
(princ)
);fin defun

You cannot modify objects created by software you don't have.

Why not just set 'Proxy images for custom objects:' on the 'Open and Save' tab of Options to "Do not show proxy graphics" if you don't want to see them?