That's the wrong place.
Customise > Configure User Paths.
At the top is an entry for the Project Directory. The default Scene directory is directly under that, so if the Project Directory is
<code>"C:\MyMaxProjects\Wibble" </code>then the default Scenes is <code>"C:\MyMaxProjects\Wibble\Scenes"</code>.
That is where Max will look for Maxstart.
Note. Maxstart.max
not Maxstart.anythingelse. Those others are UI files - keyboard, colour, menu customisations.
Max 2016 (SP1/EXT1)
Win7Pro x64 (SP1). i5-3570K @ 4.4GHz, 8Gb Ram, DX11.
nVidia GTX760 (2GB) (Driver 430.86).