m15 R3, reinstalled Windows 10, lost Dell/Alienware software

I'm no tech expert so please forgive me for any simple questions etc. that might pop up.

In short, I had to have my motherboard replaced on my Alienware m15 R3, and had to reinstall Windows 10. After a quick search, I found that all of the Dell/Alienware software that came preinstalled on the laptop when I first bought it was gone. Is there any way that I can reinstall all of that software back onto the laptop? I'm not even entirely sure what was on the computer when I first bought the laptop, but I do know it was a lot of Alienware stuff, and something called Killer Command Center(?).

I did go on dell's support site and download all the drivers and support assist program onto the computer. It's the first thing I did.

I'm sure I look strange for wanting to install software on the laptop that I never interacted with before the motherboard replacement, but I guess it would make me feel better about the laptop as a whole working correctly if I had all of the original software back on the laptop.

Once again, my apologies for my lack of tech skills, and if this seems like a "grandmas first modern computer" kind of question. Nevertheless, any help is appreciated! Thanks in advance.