i have a problem installing onyx. to the end of installation i have this window that appears :
I reisinstalled microsoft visual c++ redistributable for visual studio 2017 64 bit but no change, always the same problem. however, the msvcp140.dll files are present both in system32 and sysWOW64.
Take a look at the following post and maybe try the link in it.
You stated that you tried it for 2017, but the link provided by Obsidian Control takes you to a 2010 version. Not sure if kt will make a difference, but might be worth a try.