Minor issue - Selecting a model and pressing Delete does not remove the model as it did in V4. Backspace will delete selected models, but not the Delete key.
I ran into this as well. The keyboard shortcuts can be changed from the tools menu.
I'm curious if there was a reason that "Backspace" is the new default instead of "Delete". If I change the shortcut to "Delete", I want to avoid any potential issues that may cause.
EDIT: Just tried changing the keyboard shortcut from the "Keyboard Shortcut Editor" and I find that I'm unable to actually change the shortcut. When I choose "Edit Shortcut" I get a prompt for "Enter the new keyboard shortcut" but it doesn't register any keypresses.
Simplify3D Version 5.0.0 Linux Mint 21 (Ubuntu 22.04)
I ran into that as well. It's frustrating, I don't know why they changed it.
I tried editing the command for removing the model and it will not accept single key presses.
It will only accept Crtl+ another key. This needs to be fixed.