Thank you both for the response, however neither of these suggestions allow me to use med kits the way things currently stand. Space & Enter are both listed in control settings as the action key, but it does not seem to be working. And the [ ] keys do perform current actions if I have an item out of the inventory, like holster pistol or unpack tents, place and arm explosives etc.
I have been primarily working with ravage type scenarios lately and was using quite a few different mods. So I decided to just start from scratch. I uninstalled all of my steam content as well as the game and re-downloaded the game this morning. I will work on getting it running again with fewer mods tomorrow and see if things straighten out and start working.
Thanks once again for the suggestions and I will post on whether the reinstall fixes my issues or not. Otherwise, I think this is a great game and I'm having a lot of fun playing it.
Best, Les.