How to get Android API Level 23 as min target option?

Questions & Answers
1

I’ve tried everything I can think of, I can’t get it show beyond API Level 22.

uninstalled/installed unity 5 (different versions)
uninstalled/installed SDK, NDK
Cleaned registry in between uninstall and installs
Tried manually setting external tools in preferences
uninstalled/installed Android Build option in the Unity Installer

Nothing works. Is it not possible to build beyond API Level 22 at this point?

2

Why would you want to do that? fewer phones are running on Android 5.1 and above, around 40%. Would be better if you selected a lower version like android 4.1 which would make your app compatible with most android phones.
My thinking is that you can’t go beyond android 5.1/API level 22.