[Q] Missing downloads app topic

Hi, this is my second ever post and before any says anything, I did search for a fix before and couldn't find anything. If anyone could be so kind as to lead me to one if there is, then I will gladly use that instead. Anyways, a few months ago, I rooted my Verizon Galaxy S5. That night, I foolishly updated my phone and it updated my kernel version. As far as I could tell, nothing major/awful happened to my phone other than that every time I booted up my phone, it annoyingly said "custom" under the android splash screen and that the download app, the one that is stock to an android phone and the one you use to access all of your downloads such as an apk or a pdf file that you downloaded from the internet, was missing from my app drawer. I still had the icon on my home screen because I was using nova launcher and that saved the icon but otherwise, it was like it never existed at all on my phone. I could access the app using the home screen icon but that was it. Today, I updated my phone using Odin and now, I have lollipop 5.0 and the annoying custom from the splash screen is gone but the downloads app is still missing. Can anyone help me? Should I just try downgrading back to 4.4.2? Edit, I imported the same back up that had the download app, is it called download manager now? If so, I still don't have it except on the system itself, no way to access it.