This isn’t really a corona question, but I love how fast I get a response on these forums (is that “illegal”) - anyways:
My delete key doesn’t work in 3Ds Max, and I can’t delete anything. I have two keyboards and it doesn’t seem to work on either one of them…
Any ideas?
Does the key work in any other app (notepad)?
maybe your key binds got changed 
All objects or just XRef’s?
Works in everything else :S
And it applies to everything in MAX, can’t delete anything… Tried the “keybind” aswell, didn’t work.
It may be a crappy solution, but if you are desperate, my idea would be to reset user settings (remember to make backup first!).
https://knowledge.autodesk.com/support/3ds-max-design/troubleshooting/caas/sfdcarticles/sfdcarticles/Resetting-3ds-Max-3ds-Max-Design.html
I fixed it! Had to bind a random key to “Delete Selected” and save it (still couldn’t delete anything), then I had to reset the UI to it’s original state - voila!
Thanks for the help guys! Always appreciate it
Or,
In .kbdx file from the workspace files,
add this line
or replace 45 with 46 if you already have the line but with 45 instead 46
This worked for me!