This new forum software is pretty awful. Unfortunately you cannot show a URL in a hyperlink, it's insisting on pulling the title which is atrocious from an archival standpoint. Anyways, Adobe lists which versions of Lightroom/ACR support which cameras here:
helpx.adobe.com/camera-raw/kb/camera-raw-plug-supported-cameras.html
The non-gimmick-licensed version of Lightroom has been abandoned at version 6.14, but that should be enough for the D7000 and D7100. If you don't mind renting your software (we're all made of money, right?) Adobe maintains rental versions of Lightroom "Classic" and Lightroom UberGimmick. From my end, the only meaningful difference between Lightroom 4 and 6 was that 6 supported the D750 I was using for a few weeks.
There are plenty of free options as well. Versions of Apple's OSX released after the D7000/7100 should be able to parse NEFs just fine with the Preview app Nikon used to have free software available for download (ViewNX2?). Nikon used to have a more full featured offering which you could buy (secret file format and paid software? awesome!). Google Photos should support NEFs from your cameras.
There's also a variety of open source stuff that should work on Windows like GIMP (not really photo oriented, really archaic interface, but should work in a pinch), darktable (a great combination of the worst features of proprietary quality and open source support, and it's comically unstable), ufraw (both from the command line and as a GUI), RawStudio, and RawTherapee.