How to reset autocad 2016 settings

Hi all.

I was working and a message displaying fatal error appeared on my screen.

after saving the work, I reopened the file and unfortunately I can no longer delete with the "Delete" or delete key from my keyboard.

Also after when I select a line and I right-click the delete, move and other options no longer display.

I restarted the post and I even reinstalled AutoCAD 2016 but still the same problem.

Really I don't know what to do anymore

Does it do it only with this file (the one active at the time of the crash) or with all of them?

Hello

Here is your miracle solution:

http://www.commentcamarche.net/forum/affich-12405358-touche-delete-inactive-autocad

Apparently...: pickfirst = 1