I'm afraid there is no option for first layer high at MB desktop.
You can try with Simplify3d

But also, you can fine tune leveling of build plate.
Get yourself big surface like that:
https://onedrive.live.com/redir?resi...t=file%2cthing
adjust first layer speed to 10
then let it print and while printing, manualy adjust right distanjce to the build plate by screwing bolts.

Regards
Roberto