Hi Guys,
a friend of mine was having an issue swapping between retail and Nasomi so I figured I'd post my findings.
the tl;dr is having a registry backup of your retail installation.
below are some default registry settings and scripts (assuming you are playing on a 64 bit OS)
assuming you installed Nasomi to C: putting the below pastebin content into a file and give it an extension of .bat or .cmd will register the DLLs for you (might have to run as admin)
https://pastebin.com/tNtu7imWand this is for retail on a 64 bit OS
https://pastebin.com/MfePEqf0as for the registry (please bear in mind these are defaults)
Retail:
https://pastebin.com/nSQC9gSdNasomi:
https://pastebin.com/2KwWY24qIf you are having issues feel free to post here and I'll do my best to help.